linaro-kernel June 2014

linaro-kernel@lists.linaro.org

91 participants
222 discussions

[patch added to the 3.12 stable tree] hrtimer: Set expiry time before switch_hrtimer_base()

by Jiri Slaby

From: Viresh Kumar <viresh.kumar(a)linaro.org> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== commit 84ea7fe37908254c3bd90910921f6e1045c1747a upstream. switch_hrtimer_base() calls hrtimer_check_target() which ensures that we do not migrate a timer to a remote cpu if the timer expires before the current programmed expiry time on that remote cpu. But __hrtimer_start_range_ns() calls switch_hrtimer_base() before the new expiry time is set. So the sanity check in hrtimer_check_target() is operating on stale or even uninitialized data. Update expiry time before calling switch_hrtimer_base(). [ tglx: Rewrote changelog once again ] Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> Cc: linaro-kernel(a)lists.linaro.org Cc: linaro-networking(a)linaro.org Cc: fweisbec(a)gmail.com Cc: arvind.chauhan(a)arm.com Link: http://lkml.kernel.org/r/81999e148745fc51bbcd0615823fbab9b2e87e23.139988225… Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Signed-off-by: Jiri Slaby <jslaby(a)suse.cz> --- kernel/hrtimer.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 6de65d8a70e2..aa149222cd8e 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -1002,11 +1002,8 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, /* Remove an active timer from the queue: */ ret = remove_hrtimer(timer, base); - /* Switch the timer base, if necessary: */ - new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); - if (mode & HRTIMER_MODE_REL) { - tim = ktime_add_safe(tim, new_base->get_time()); + tim = ktime_add_safe(tim, base->get_time()); /* * CONFIG_TIME_LOW_RES is a temporary way for architectures * to signal that they simply return xtime in @@ -1021,6 +1018,9 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, hrtimer_set_expires_range_ns(timer, tim, delta_ns); + /* Switch the timer base, if necessary: */ + new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED); + timer_stats_hrtimer_set_start_info(timer); leftmost = enqueue_hrtimer(timer, new_base); -- 1.9.3

10 years, 8 months

[PATCH V2 1/2] sched: idle: Encapsulate the code to compile it out

by Daniel Lezcano

Encapsulate the large portion of cpuidle_idle_call inside another function so when CONFIG_CPU_IDLE=n, the code will be compiled out. Also that is benefitial for the clarity of the code as it removes a nested indentation level. Signed-off-by: Daniel Lezcano <daniel.lezcano(a)linaro.org> --- kernel/sched/idle.c | 161 +++++++++++++++++++++++++++------------------------ 1 file changed, 86 insertions(+), 75 deletions(-) diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c index b8cd302..f2f4bc9 100644 --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -63,6 +63,90 @@ void __weak arch_cpu_idle(void) local_irq_enable(); } +#ifdef CONFIG_CPU_IDLE +static int __cpuidle_idle_call(void) +{ + struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices); + struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev); + int next_state, entered_state, ret; + bool broadcast; + + /* + * Check if the cpuidle framework is ready, otherwise fallback + * to the default arch specific idle method + */ + ret = cpuidle_enabled(drv, dev); + if (ret) + return ret; + + /* + * Ask the governor to choose an idle state it thinks + * it is convenient to go to. There is *always* a + * convenient idle state + */ + next_state = cpuidle_select(drv, dev); + + /* + * The idle task must be scheduled, it is pointless to + * go to idle, just update no idle residency and get + * out of this function + */ + if (current_clr_polling_and_test()) { + dev->last_residency = 0; + entered_state = next_state; + local_irq_enable(); + } else { + broadcast = !!(drv->states[next_state].flags & + CPUIDLE_FLAG_TIMER_STOP); + + if (broadcast) + /* + * Tell the time framework to switch to a + * broadcast timer because our local timer + * will be shutdown. If a local timer is used + * from another cpu as a broadcast timer, this + * call may fail if it is not available + */ + ret = clockevents_notify( + CLOCK_EVT_NOTIFY_BROADCAST_ENTER, + &dev->cpu); + + if (!ret) { + trace_cpu_idle_rcuidle(next_state, dev->cpu); + + /* + * Enter the idle state previously returned by + * the governor decision. This function will + * block until an interrupt occurs and will + * take care of re-enabling the local + * interrupts + */ + entered_state = cpuidle_enter(drv, dev, next_state); + + trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu); + + if (broadcast) + clockevents_notify( + CLOCK_EVT_NOTIFY_BROADCAST_EXIT, + &dev->cpu); + + /* + * Give the governor an opportunity to reflect + * on the outcome + */ + cpuidle_reflect(dev, entered_state); + } + } + + return 0; +} +#else +static int inline __cpuidle_idle_call(void) +{ + return -ENOSYS; +} +#endif + /** * cpuidle_idle_call - the main idle function * @@ -70,10 +154,7 @@ void __weak arch_cpu_idle(void) */ static void cpuidle_idle_call(void) { - struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices); - struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev); - int next_state, entered_state, ret; - bool broadcast; + int ret; /* * Check if the idle task must be rescheduled. If it is the @@ -100,80 +181,10 @@ static void cpuidle_idle_call(void) rcu_idle_enter(); /* - * Check if the cpuidle framework is ready, otherwise fallback - * to the default arch specific idle method - */ - ret = cpuidle_enabled(drv, dev); - - if (!ret) { - /* - * Ask the governor to choose an idle state it thinks - * it is convenient to go to. There is *always* a - * convenient idle state - */ - next_state = cpuidle_select(drv, dev); - - /* - * The idle task must be scheduled, it is pointless to - * go to idle, just update no idle residency and get - * out of this function - */ - if (current_clr_polling_and_test()) { - dev->last_residency = 0; - entered_state = next_state; - local_irq_enable(); - } else { - broadcast = !!(drv->states[next_state].flags & - CPUIDLE_FLAG_TIMER_STOP); - - if (broadcast) - /* - * Tell the time framework to switch - * to a broadcast timer because our - * local timer will be shutdown. If a - * local timer is used from another - * cpu as a broadcast timer, this call - * may fail if it is not available - */ - ret = clockevents_notify( - CLOCK_EVT_NOTIFY_BROADCAST_ENTER, - &dev->cpu); - - if (!ret) { - trace_cpu_idle_rcuidle(next_state, dev->cpu); - - /* - * Enter the idle state previously - * returned by the governor - * decision. This function will block - * until an interrupt occurs and will - * take care of re-enabling the local - * interrupts - */ - entered_state = cpuidle_enter(drv, dev, - next_state); - - trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, - dev->cpu); - - if (broadcast) - clockevents_notify( - CLOCK_EVT_NOTIFY_BROADCAST_EXIT, - &dev->cpu); - - /* - * Give the governor an opportunity to reflect on the - * outcome - */ - cpuidle_reflect(dev, entered_state); - } - } - } - - /* * We can't use the cpuidle framework, let's use the default * idle routine */ + ret = __cpuidle_idle_call(); if (ret) arch_cpu_idle(); -- 1.7.9.5

10 years, 8 months

mainline boot: 61 pass, 3 fail (v3.15-rc8-6620-g2b03adc)

by Kevin's boot bot

Tree/Branch: mainline Git describe: v3.15-rc8-6620-g2b03adc Failed boot tests (console logs at the end) =========================================== armada-xp-openblocks-ax3-4: FAIL: arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y exynos5420-arndale-octa: FAIL: arm-exynos_defconfig ste-snowball: FAIL: arm-u8500_defconfig Full Report =========== arm-davinci_all_defconfig ------------------------- legacy,dm365evm 0 min 18.3 sec: PASS da850-evm 0 min 15.5 sec: PASS arm-tegra_defconfig ------------------- tegra124-jetson-tk1 0 min 17.3 sec: PASS tegra30-beaver 0 min 25.9 sec: PASS arm-multi_v7_defconfig+CONFIG_ARM_LPAE=y ---------------------------------------- tegra124-jetson-tk1 0 min 17.6 sec: PASS armada-xp-openblocks-ax3-4 0 min 25.9 sec: PASS omap5-uevm 1 min 43.2 sec: PASS (Warnings: 6) sun7i-a20-cubieboard2 0 min 12.9 sec: PASS arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 21.2 sec: FAIL armada-370-mirabox 0 min 21.6 sec: PASS arm-omap2plus_defconfig ----------------------- legacy,3730xm 0 min 41.4 sec: PASS am335x-boneblack 0 min 22.5 sec: PASS omap3-beagle-xm 0 min 50.0 sec: PASS legacy,3530beagle 0 min 23.4 sec: PASS (Warnings: 1) omap4-panda 0 min 48.3 sec: PASS (Warnings: 1) omap3-overo-tobi 0 min 26.3 sec: PASS am335x-bone 0 min 24.1 sec: PASS omap3-overo-storm-tobi 0 min 24.9 sec: PASS omap5-uevm 1 min 0.1 sec: PASS (Warnings: 6) omap3-n900 0 min 17.5 sec: PASS legacy,n900 0 min 17.7 sec: PASS (Warnings: 1) omap4-panda-es 0 min 48.5 sec: PASS (Warnings: 1) legacy,3730storm 0 min 20.1 sec: PASS legacy,3530overo 0 min 21.3 sec: PASS (Warnings: 1) arm-multi_v7_defconfig ---------------------- imx6dl-wandboard,wand-solo 0 min 15.3 sec: PASS am335x-boneblack 0 min 22.0 sec: PASS sun7i-a20-cubieboard2 0 min 13.0 sec: PASS sun4i-a10-cubieboard 0 min 17.5 sec: PASS exynos5410-smdk5410 0 min 28.9 sec: PASS am335x-bone 0 min 24.1 sec: PASS tegra124-jetson-tk1 0 min 17.4 sec: PASS armada-370-mirabox 0 min 21.7 sec: PASS omap4-panda 0 min 56.7 sec: PASS (Warnings: 1) imx6q-wandboard 0 min 13.9 sec: PASS imx6dl-wandboard,wand-dual 0 min 15.4 sec: PASS ste-snowball 1 min 14.5 sec: PASS tegra30-beaver 0 min 26.0 sec: PASS omap3-n900 0 min 16.6 sec: PASS qcom-apq8074-dragonboard 0 min 19.7 sec: PASS bcm28155-ap 0 min 26.7 sec: PASS omap3-overo-tobi 0 min 22.2 sec: PASS omap3-overo-storm-tobi 0 min 24.3 sec: PASS omap3-beagle-xm 0 min 46.6 sec: PASS exynos5420-arndale-octa 0 min 41.0 sec: PASS armada-xp-openblocks-ax3-4 0 min 26.1 sec: PASS omap5-uevm 1 min 42.5 sec: PASS (Warnings: 6) omap4-panda-es 0 min 52.4 sec: PASS (Warnings: 1) exynos5250-arndale 0 min 31.2 sec: PASS arm-sunxi_defconfig ------------------- sun7i-a20-cubieboard2 0 min 11.6 sec: PASS sun4i-a10-cubieboard 0 min 11.4 sec: PASS arm-qcom_defconfig ------------------ qcom-apq8074-dragonboard 0 min 21.9 sec: PASS arm-bcm_defconfig ----------------- bcm28155-ap 0 min 23.1 sec: PASS arm-exynos_defconfig -------------------- exynos5420-arndale-octa 0 min 38.6 sec: FAIL exynos5250-arndale 0 min 29.9 sec: PASS exynos5410-smdk5410 0 min 27.3 sec: PASS arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual 0 min 16.5 sec: PASS imx6dl-wandboard,wand-solo 0 min 16.1 sec: PASS imx6q-wandboard 0 min 14.1 sec: PASS arm-u8500_defconfig ------------------- ste-snowball 1 min 50.4 sec: FAIL arm-multi_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 25.6 sec: PASS armada-370-mirabox 0 min 20.8 sec: PASS arm-mvebu_v7_defconfig ---------------------- armada-xp-openblocks-ax3-4 0 min 22.3 sec: PASS armada-370-mirabox 0 min 20.4 sec: PASS arm-sama5_defconfig ------------------- sama5d35ek 0 min 20.4 sec: PASS Console logs for failures ========================= arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4: FAIL: last 40 lines of boot log: ------------------------------------------------------------ 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000 55048012 02109471 [<c0186b78>] (_set_bit) from [<c01c9ba8>] (n_tty_set_termios+0x234/0x348) [<c01c9ba8>] (n_tty_set_termios) from [<c01c9da8>] (n_tty_open+0xec/0x114) [<c01c9da8>] (n_tty_open) from [<c01cd804>] (tty_ldisc_open+0x3c/0x78) [<c01cd804>] (tty_ldisc_open) from [<c01cdf80>] (tty_ldisc_setup+0x18/0x5c) [<c01cdf80>] (tty_ldisc_setup) from [<c01c6bf4>] (tty_init_dev+0x94/0x184) [<c01c6bf4>] (tty_init_dev) from [<c01c7500>] (tty_open+0x2d0/0x5a8) [<c01c7500>] (tty_open) from [<c00ae7d0>] (chrdev_open+0xc4/0x184) [<c00ae7d0>] (chrdev_open) from [<c00a9250>] (do_dentry_open.isra.12+0x1b0/0x270) [<c00a9250>] (do_dentry_open.isra.12) from [<c00a93e0>] (finish_open+0x20/0x38) [<c00a93e0>] (finish_open) from [<c00b747c>] (do_last.isra.41+0x5a4/0xb50) [<c00b747c>] (do_last.isra.41) from [<c00b7adc>] (path_openat+0xb4/0x5c8) [<c00b7adc>] (path_openat) from [<c00b82f4>] (do_filp_open+0x2c/0x80) [<c00b82f4>] (do_filp_open) from [<c00aa338>] (do_sys_open+0x110/0x1cc) [<c00aa338>] (do_sys_open) from [<c0580c0c>] (kernel_init_freeable+0x128/0x1c8) [<c0580c0c>] (kernel_init_freeable) from [<c041fea8>] (kernel_init+0x8/0xec) [<c041fea8>] (kernel_init) from [<c000e638>] (ret_from_fork+0x14/0x3c) Code: 00f091f5 1233a0e1 9f2f91e1 032082e1 (920f81e1) ---[ end trace d04ca1b856ed25fd ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU1: stopping CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 3.15.0-rc8-06620-g2b03adc #1 [<c0014b04>] (unwind_backtrace) from [<c0010eb0>] (show_stack+0x10/0x14) [<c0010eb0>] (show_stack) from [<c0422f68>] (dump_stack+0x74/0x90) [<c0422f68>] (dump_stack) from [<c00139dc>] (handle_IPI+0x134/0x170) [<c00139dc>] (handle_IPI) from [<c0008650>] (armada_370_xp_handle_irq+0xb0/0xcc) [<c0008650>] (armada_370_xp_handle_irq) from [<c0011980>] (__irq_svc+0x40/0x50) Exception stack(0xed87bfa0 to 0xed87bfe8) bfa0: edfd53d8 00000000 007101ea 00000000 ed87a000 c05c049c ed87a000 c0429d78 bfc0: c05f4e97 00000001 c05f4e97 ed87a000 00000000 ed87bfe8 c000f168 c004ed84 bfe0: 60000313 ffffffff [<c0011980>] (__irq_svc) from [<c004ed84>] (cpu_startup_entry+0xec/0x144) [<c004ed84>] (cpu_startup_entry) from [<00008768>] (0x8768) ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ~$off # PYBOOT: Exception: kernel: ERROR: failed to boot: Unhandled fault # PYBOOT: Time: 21.22 seconds. # PYBOOT: Result: FAIL arm-exynos_defconfig -------------------- exynos5420-arndale-octa: FAIL: last 40 lines of boot log: --------------------------------------------------------- [ 16.240115] of_get_named_gpiod_flags exited with status 0 [ 16.244278] mmcblk0: p1 p2 p3 p4 [ 16.247509] Unhandled fault: external abort on non-linefetch (0x008) at 0xf00b8088 [ 16.254985] Internal error: : 8 [#2] PREEMPT SMP ARM [ 16.259921] Modules linked in: [ 16.262959] CPU: 0 PID: 6 Comm: kworker/u16:0 Tainted: G D 3.15.0-rc8-06620-g2b03adc #1 [ 16.271889] Workqueue: kmmcd mmc_rescan [ 16.275694] task: ef014000 ti: ef0b4000 task.ti: ef0b4000 [ 16.281074] PC is at rescan_partitions+0xb4/0x290 [ 16.285746] LR is at 0xf00b8000 [ 16.288867] pc : [<c01af9a0>] lr : [<f00b8000>] psr: 20000113 [ 16.288867] sp : ef0b5c78 ip : 00000000 fp : 00000000 [ 16.300303] r10: 00000000 r9 : ed6a7180 r8 : ed604200 [ 16.305503] r7 : 00000000 r6 : eec24280 r5 : 00000000 r4 : 00000008 [ 16.312002] r3 : 00000013 r2 : 00000000 r1 : 00000000 r0 : 00000001 [ 16.318502] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel [ 16.325780] Control: 10c5387d Table: 2000406a DAC: 00000015 [ 16.331499] Process kworker/u16:0 (pid: 6, stack limit = 0xef0b4240) [ 16.337824] Stack: (0xef0b5c78 to 0xef0b6000) [ 16.342159] 5c60: c054c984 00000001 [ 16.350306] 5c80: ef0b4000 c0387410 00000001 c05284b8 ed58f4d8 c0528388 eec24380 ed58f3a8 [ 16.358451] 5ca0: eec24330 eec24280 00000000 ed58f3a8 00000000 00000000 00000000 eec24280 [ 16.366596] 5cc0: ed604200 eec24290 00000001 00000000 00000000 c00e305c c00e1a00 00000000 [ 16.374743] 5ce0: 00000000 00000001 eec24280 00000000 ed604270 ed60420c 00000000 ed58f2c0 [ 16.382887] 5d00: 00000003 c00e32c0 c052a68c 00000001 00000003 c03886d8 c052a68c c00e1fd0 [ 16.391033] 5d20: ef0b5d2c c0221dbc ed604240 00000001 eec24280 ed604200 ed604270 ed60420c [ 16.399178] 5d40: 00000000 ed58f2c0 00000003 c01ad8b4 c01ac704 ed604200 00000080 0b300000 [ 16.407324] 5d60: 00000002 ed68c000 ed689800 ed68ec00 ed68ec00 ed68eebc c02baacc ed689800 [ 16.415469] 5d80: ed68ec00 ed689988 ef0b5dce c02bb9d0 00000056 ed68986c 00000003 ed68c000 [ 16.423614] 5da0: ed689800 c02bc600 00000003 ef0b5dce 00000008 ed696870 c0468fcc ed68ee98 [ 16.431760] 5dc0: 00000000 34362e33 42694720 32310000 694b2038 c0000042 00000001 ed689808 [ 16.439905] 5de0: c058e55c 00000000 c054c90c 00000001 00000000 c054c598 ef013c00 c02b0e68 [ 16.448051] 5e00: c02b0e50 c0225860 00000000 ed689808 c0225a10 ed68f808 00000000 c022403c [ 16.456196] 5e20: ef2c5698 ed74fdc4 ed689808 ed68983c c054c4b8 c022573c ed689808 ed689808 [ 16.464342] 5e40: c054c4b8 c0224eac ed689808 00000000 ed689810 c0223514 ef013c00 c0381354 [ 16.472488] 5e60: c047c108 ef0b5e7c 00061a80 ed689800 ed689808 c0451250 00000001 c047c0bc [ 16.480633] 5e80: 00000000 c02b127c c047c0bc c0451250 c047c078 00000001 ed68~$off # PYBOOT: Exception: kernel: ERROR: failed to boot: Unhandled fault # PYBOOT: Time: 38.61 seconds. # PYBOOT: Result: FAIL arm-u8500_defconfig ------------------- ste-snowball: FAIL: last 40 lines of boot log: ---------------------------------------------- [ 3.472839] platform musb-hdrc.20.auto: Driver musb-hdrc requests probe deferral [ 3.480773] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.20.auto [ 3.492706] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.20.auto) status -22 [ 3.500030] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.511505] musb-ux500 musb-hdrc.20.auto: Error applying setting, reverse things back [ 3.520050] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.21.auto [ 3.531982] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.21.auto) status -22 [ 3.539306] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.550781] musb-hdrc musb-hdrc.21.auto: Error applying setting, reverse things back [ 3.558593] HS USB OTG: no transceiver configured [ 3.563323] musb-hdrc musb-hdrc.21.auto: musb_init_controller failed with status -517 [ 3.571166] platform musb-hdrc.21.auto: Driver musb-hdrc requests probe deferral [ 3.579101] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.21.auto [ 3.591033] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.21.auto) status -22 [ 3.598327] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.609802] musb-ux500 musb-hdrc.21.auto: Error applying setting, reverse things back [ 3.618347] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.22.auto [ 3.630279] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.22.auto) status -22 [ 3.637603] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.649078] musb-hdrc musb-hdrc.22.auto: Error applying setting, reverse things back [ 3.656890] HS USB OTG: no transceiver configured [ 3.661621] musb-hdrc musb-hdrc.22.auto: musb_init_controller failed with status -517 [ 3.669464] platform musb-hdrc.22.auto: Driver musb-hdrc requests probe deferral [ 3.677459] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.22.auto [ 3.689361] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.22.auto) status -22 [ 3.696685] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.708160] musb-ux500 musb-hdrc.22.auto: Error applying setting, reverse things back [ 3.716735] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.23.auto [ 3.728668] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.23.auto) status -22 [ 3.735992] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.747467] musb-hdrc musb-hdrc.23.auto: Error applying setting, reverse things back [ 3.755279] HS USB OTG: no transceiver configured [ 3.760009] musb-hdrc musb-hdrc.23.auto: musb_init_controller failed with status -517 [ 3.767852] platform musb-hdrc.23.auto: Driver musb-hdrc requests probe deferral [ 3.775817] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.23.auto [ 3.787750] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.23.auto) status -22 ~$off # PYBOOT: Exception: kernel: ERROR: failed to boot: <class 'pexpect.TIMEOUT'> # PYBOOT: Time: 110.42 seconds. # PYBOOT: Result: FAIL

10 years, 8 months

[PATCH V5 0/2] cpufreq: add support for intermediate (stable) frequencies

by Viresh Kumar

Douglas Anderson, recently pointed out an interesting problem due to which udelay() was expiring earlier than it should. While transitioning between frequencies few platforms may temporarily switch to a stable frequency, waiting for the main PLL to stabilize. For example: When we transition between very low frequencies on exynos, like between 200MHz and 300MHz, we may temporarily switch to a PLL running at 800MHz. No CPUFREQ notification is sent for that. That means there's a period of time when we're running at 800MHz but loops_per_jiffy is calibrated at between 200MHz and 300MHz. And so udelay behaves badly. To get this fixed in a generic way, lets introduce another set of callbacks get_intermediate() and target_intermediate(), only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION unset. get_intermediate() should return a stable intermediate frequency platform wants to switch to, and target_intermediate() should set CPU to to that frequency, before jumping to the frequency corresponding to 'index'. Core will take care of sending notifications and driver doesn't have to handle them in target_intermediate() or target_index(). This patchset also update Tegra to use this new infrastructure and is already tested by Stephen. V4->V5: - Moved setting old frequency to __target_index() from __target_intermediate() - Replaced retval with 0 during call to cpufreq_freq_transition_end() for restoring to restored freq. - Fix important issues with Tegra driver as reported by Stephen. - Dropped patch 1, already applied: "cpufreq: handle calls to ->target_index() in separate routine" V3->V4: - Allow get_intermediate() to return zero when we don't need to switch to intermediate first - Get rid of 'goto' and create another routine for handling intermediate freqs - Allow target_index() to fail, its not a crime :) - Fix tegra driver to return zero from get_intermediate() for few situations (refer to patch 3/4) - Fix issues with tegra's patch, like s/rate/rate * 1000 - Overall there are more modifications that what Doug requested as I felt we need better support from core. - Looks much better now, thanks Doug :) V2-V3: - Fix spelling error: s/Uset/Used - Update tegra with the changes Stephen suggested - Include a dependency patch sent separately earlier (3/4) V1-V2: Almost changed completely, V1 was here: https://lkml.org/lkml/2014/5/15/40 Viresh Kumar (2): cpufreq: add support for intermediate (stable) frequencies cpufreq: Tegra: implement intermediate frequency callbacks Documentation/cpu-freq/cpu-drivers.txt | 29 +++++++++- drivers/cpufreq/cpufreq.c | 67 ++++++++++++++++++++--- drivers/cpufreq/tegra-cpufreq.c | 97 ++++++++++++++++++++++------------ include/linux/cpufreq.h | 25 +++++++++ 4 files changed, 174 insertions(+), 44 deletions(-) -- 2.0.0.rc2

10 years, 8 months

arm-soc boot: 63 pass, 0 fail (v3.15-rc8-4595-gc96fa31)

by Kevin's boot bot

Tree/Branch: arm-soc Git describe: v3.15-rc8-4595-gc96fa31 Full Report =========== arm-davinci_all_defconfig ------------------------- legacy,dm365evm 0 min 18.0 sec: PASS da850-evm 0 min 16.6 sec: PASS arm-tegra_defconfig ------------------- tegra124-jetson-tk1 0 min 17.9 sec: PASS tegra30-beaver 0 min 24.4 sec: PASS arm-multi_v7_defconfig+CONFIG_ARM_LPAE=y ---------------------------------------- tegra124-jetson-tk1 0 min 17.4 sec: PASS armada-xp-openblocks-ax3-4 0 min 24.4 sec: PASS omap5-uevm 1 min 38.6 sec: PASS (Warnings: 6) sun7i-a20-cubieboard2 0 min 13.1 sec: PASS arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 23.6 sec: PASS armada-370-mirabox 0 min 21.6 sec: PASS arm-omap2plus_defconfig ----------------------- legacy,3730xm 0 min 41.3 sec: PASS am335x-boneblack 0 min 22.4 sec: PASS omap3-beagle-xm 0 min 50.0 sec: PASS legacy,3530beagle 0 min 28.4 sec: PASS (Warnings: 1) omap4-panda 0 min 55.1 sec: PASS omap3-overo-tobi 0 min 23.2 sec: PASS am335x-bone 0 min 29.1 sec: PASS omap3-overo-storm-tobi 0 min 21.9 sec: PASS omap5-uevm 0 min 57.0 sec: PASS (Warnings: 6) omap3-n900 0 min 17.6 sec: PASS legacy,n900 0 min 17.2 sec: PASS (Warnings: 1) omap4-panda-es 0 min 50.1 sec: PASS legacy,3730storm 0 min 22.8 sec: PASS legacy,3530overo 0 min 24.5 sec: PASS (Warnings: 1) arm-multi_v7_defconfig ---------------------- imx6dl-wandboard,wand-solo 0 min 15.4 sec: PASS am335x-boneblack 0 min 22.5 sec: PASS sun7i-a20-cubieboard2 0 min 15.8 sec: PASS sun4i-a10-cubieboard 0 min 17.5 sec: PASS exynos5410-smdk5410 0 min 28.8 sec: PASS am335x-bone 0 min 23.6 sec: PASS tegra124-jetson-tk1 0 min 18.4 sec: PASS armada-370-mirabox 0 min 21.7 sec: PASS omap4-panda 0 min 52.6 sec: PASS imx6q-wandboard 0 min 13.9 sec: PASS imx6dl-wandboard,wand-dual 0 min 15.3 sec: PASS ste-snowball 1 min 14.3 sec: PASS tegra30-beaver 0 min 20.7 sec: PASS omap3-n900 0 min 16.4 sec: PASS qcom-apq8074-dragonboard 0 min 18.9 sec: PASS bcm28155-ap 0 min 26.9 sec: PASS omap3-overo-tobi 0 min 22.5 sec: PASS omap3-overo-storm-tobi 0 min 23.9 sec: PASS omap3-beagle-xm 0 min 43.7 sec: PASS exynos5420-arndale-octa 0 min 41.2 sec: PASS armada-xp-openblocks-ax3-4 0 min 26.1 sec: PASS omap5-uevm 1 min 39.4 sec: PASS (Warnings: 6) omap4-panda-es 0 min 51.3 sec: PASS exynos5250-arndale 0 min 31.3 sec: PASS arm-sunxi_defconfig ------------------- sun7i-a20-cubieboard2 0 min 11.9 sec: PASS sun4i-a10-cubieboard 0 min 11.4 sec: PASS arm-bcm_defconfig ----------------- bcm28155-ap 0 min 23.3 sec: PASS arm-exynos_defconfig -------------------- exynos5420-arndale-octa 0 min 39.9 sec: PASS exynos5250-arndale 0 min 34.9 sec: PASS exynos5410-smdk5410 0 min 27.3 sec: PASS arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual 0 min 15.5 sec: PASS imx6dl-wandboard,wand-solo 0 min 15.7 sec: PASS imx6q-wandboard 0 min 14.1 sec: PASS arm-u8500_defconfig ------------------- ste-snowball 0 min 25.3 sec: PASS arm-multi_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 25.6 sec: PASS armada-370-mirabox 0 min 20.8 sec: PASS arm-mvebu_v7_defconfig ---------------------- armada-xp-openblocks-ax3-4 0 min 22.3 sec: PASS armada-370-mirabox 0 min 20.1 sec: PASS arm-sama5_defconfig ------------------- sama5d35ek 0 min 15.3 sec: PASS

10 years, 8 months

next boot: 62 pass, 1 fail (next-20140605)

by Kevin's boot bot

Tree/Branch: next Git describe: next-20140605 Failed boot tests (console logs at the end) =========================================== ste-snowball: DEAD: arm-u8500_defconfig Full Report =========== arm-davinci_all_defconfig ------------------------- legacy,dm365evm 0 min 17.2 sec: PASS da850-evm 0 min 14.9 sec: PASS arm-tegra_defconfig ------------------- tegra124-jetson-tk1 0 min 18.0 sec: PASS tegra30-beaver 0 min 18.0 sec: PASS arm-multi_v7_defconfig+CONFIG_ARM_LPAE=y ---------------------------------------- tegra124-jetson-tk1 0 min 17.7 sec: PASS armada-xp-openblocks-ax3-4 0 min 25.4 sec: PASS omap5-uevm 1 min 41.2 sec: PASS (Warnings: 1) sun7i-a20-cubieboard2 0 min 13.7 sec: PASS arm-mvebu_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 23.7 sec: PASS armada-370-mirabox 0 min 20.6 sec: PASS arm-omap2plus_defconfig ----------------------- legacy,3730xm 0 min 36.7 sec: PASS am335x-boneblack 0 min 22.0 sec: PASS omap3-beagle-xm 0 min 45.6 sec: PASS legacy,3530beagle 0 min 23.4 sec: PASS (Warnings: 1) omap4-panda 0 min 55.8 sec: PASS (Warnings: 1) omap3-overo-tobi 0 min 22.9 sec: PASS am335x-bone 0 min 23.9 sec: PASS omap3-overo-storm-tobi 0 min 22.0 sec: PASS omap5-uevm 0 min 56.4 sec: PASS (Warnings: 1) omap3-n900 0 min 17.3 sec: PASS legacy,n900 0 min 17.1 sec: PASS (Warnings: 1) omap4-panda-es 0 min 48.5 sec: PASS (Warnings: 1) legacy,3730storm 0 min 19.9 sec: PASS legacy,3530overo 0 min 20.9 sec: PASS (Warnings: 1) arm-multi_v7_defconfig ---------------------- imx6dl-wandboard,wand-solo 0 min 15.4 sec: PASS am335x-boneblack 0 min 22.6 sec: PASS sun7i-a20-cubieboard2 0 min 13.0 sec: PASS sun4i-a10-cubieboard 0 min 17.6 sec: PASS exynos5410-smdk5410 0 min 28.5 sec: PASS am335x-bone 0 min 23.7 sec: PASS tegra124-jetson-tk1 0 min 18.2 sec: PASS armada-370-mirabox 0 min 21.8 sec: PASS omap4-panda 0 min 49.3 sec: PASS (Warnings: 1) imx6q-wandboard 0 min 14.0 sec: PASS imx6dl-wandboard,wand-dual 0 min 15.4 sec: PASS ste-snowball 1 min 13.5 sec: PASS tegra30-beaver 0 min 24.0 sec: PASS omap3-n900 0 min 16.5 sec: PASS qcom-apq8074-dragonboard 0 min 20.2 sec: PASS bcm28155-ap 0 min 27.1 sec: PASS omap3-overo-tobi 0 min 22.6 sec: PASS omap3-overo-storm-tobi 0 min 23.8 sec: PASS omap3-beagle-xm 0 min 47.6 sec: PASS exynos5420-arndale-octa 0 min 41.0 sec: PASS armada-xp-openblocks-ax3-4 0 min 31.0 sec: PASS omap5-uevm 1 min 35.3 sec: PASS (Warnings: 1) omap4-panda-es 0 min 50.2 sec: PASS (Warnings: 1) exynos5250-arndale 0 min 31.4 sec: PASS arm-sunxi_defconfig ------------------- sun7i-a20-cubieboard2 0 min 11.6 sec: PASS sun4i-a10-cubieboard 0 min 14.5 sec: PASS arm-bcm_defconfig ----------------- bcm28155-ap 0 min 23.2 sec: PASS arm-exynos_defconfig -------------------- exynos5420-arndale-octa 0 min 39.7 sec: PASS exynos5250-arndale 0 min 30.3 sec: PASS exynos5410-smdk5410 0 min 27.7 sec: PASS arm-imx_v6_v7_defconfig ----------------------- imx6dl-wandboard,wand-dual 0 min 15.8 sec: PASS imx6dl-wandboard,wand-solo 0 min 15.9 sec: PASS imx6q-wandboard 0 min 14.0 sec: PASS arm-u8500_defconfig ------------------- ste-snowball 0 min 0.0 sec: DEAD arm-multi_v7_defconfig+CONFIG_CPU_BIG_ENDIAN=y ---------------------------------------------- armada-xp-openblocks-ax3-4 0 min 26.8 sec: PASS armada-370-mirabox 0 min 22.6 sec: PASS arm-mvebu_v7_defconfig ---------------------- armada-xp-openblocks-ax3-4 0 min 22.2 sec: PASS armada-370-mirabox 0 min 20.1 sec: PASS arm-sama5_defconfig ------------------- sama5d35ek 0 min 15.5 sec: PASS (Warnings: 1) Console logs for failures ========================= arm-u8500_defconfig ------------------- ste-snowball: DEAD: last 40 lines of boot log: ---------------------------------------------- [ 3.472045] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.20.auto) status -22 [ 3.479339] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.490844] musb-hdrc musb-hdrc.20.auto: Error applying setting, reverse things back [ 3.498657] HS USB OTG: no transceiver configured [ 3.503387] musb-hdrc musb-hdrc.20.auto: musb_init_controller failed with status -517 [ 3.511230] platform musb-hdrc.20.auto: Driver musb-hdrc requests probe deferral [ 3.519165] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.20.auto [ 3.531097] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.20.auto) status -22 [ 3.538391] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.549865] musb-ux500 musb-hdrc.20.auto: Error applying setting, reverse things back [ 3.558380] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.21.auto [ 3.570343] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.21.auto) status -22 [ 3.577636] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.589141] musb-hdrc musb-hdrc.21.auto: Error applying setting, reverse things back [ 3.596954] HS USB OTG: no transceiver configured [ 3.601654] musb-hdrc musb-hdrc.21.auto: musb_init_controller failed with status -517 [ 3.609497] platform musb-hdrc.21.auto: Driver musb-hdrc requests probe deferral [ 3.617431] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.21.auto [ 3.629364] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.21.auto) status -22 [ 3.636657] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.648162] musb-ux500 musb-hdrc.21.auto: Error applying setting, reverse things back [ 3.656677] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.22.auto [ 3.668609] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.22.auto) status -22 [ 3.675933] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.687408] musb-hdrc musb-hdrc.22.auto: Error applying setting, reverse things back [ 3.695251] HS USB OTG: no transceiver configured [ 3.699951] musb-hdrc musb-hdrc.22.auto: musb_init_controller failed with status -517 [ 3.707794] platform musb-hdrc.22.auto: Driver musb-hdrc requests probe deferral [ 3.715728] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.22.auto [ 3.727630] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.22.auto) status -22 [ 3.734954] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.746429] musb-ux500 musb-hdrc.22.auto: Error applying setting, reverse things back [ 3.754943] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.23.auto [ 3.766876] pinctrl-nomadik soc:pinctrl: pin-256 (musb-hdrc.23.auto) status -22 [ 3.774200] pinctrl-nomadik soc:pinctrl: could not request pin 256 (GPIO256_AF28) from group usb_a_1 on device pinctrl-nomadik [ 3.785675] musb-hdrc musb-hdrc.23.auto: Error applying setting, reverse things back [ 3.793487] HS USB OTG: no transceiver configured [ 3.798187] musb-hdrc musb-hdrc.23.auto: musb_init_controller failed with status -517 [ 3.806060] platform musb-hdrc.23.auto: Driver musb-hdrc requests probe deferral [ 3.813964] pinctrl-nomadik soc:pinctrl: pin GPIO256_AF28 already requested by a03e0000.usb_per5; cannot claim for musb-hdrc.23.auto

10 years, 8 months

Re: USB serial in ubuntu for arndale

by Botao Sun

Hi Alexandru, No, I'm afraid not that stable but this one: https://git.linaro.org/kernel/linux-linaro-tracking.git There is a wiki page for that Linaro Kernel tree process: https://wiki.linaro.org/Platform/DevPlatform/LinuxLinaroKernelTreeProcess I added Andrey Konovalov to CC list since he currently is the maintainer of linux-linaro kernel and hopefully can provide you more information. Thanks. On 6 June 2014 00:17, Alexandru Rosca <srosca(a)bu.edu> wrote: > Hi Botao, > > Thanks for your help. I am using Ubuntu trusty 14.05. When I type uname -a > I get Linux linaro 3.15.0-1 arndale. However the latest version on that > link seems to be 3.1. Should I use the one in linux-linaro-stable.git? > > Cheers > > > On Thu, Jun 5, 2014 at 10:11 AM, Botao Sun <botao.sun(a)linaro.org> wrote: > >> Hi Alexandru, >> >> Here is the Linaro Kernel git repository list: >> >> https://git.linaro.org/?a=project_list;pf=kernel >> >> And which platform are you working on? Android or ubuntu? I ask because >> the Kernel version on Android is the old one: 3.9.1 >> >> FYI. >> >> >> >> On 5 June 2014 23:56, Alexandru Rosca <srosca(a)bu.edu> wrote: >> >>> Hi Botao, >>> >>> The instructions online for building and deploying a linux kernel seems >>> to be for version 3.1. I am using the latest arndale OS from the linaro >>> releases and would like to know which source code you suggest I compile >>> with the config file. >>> >>> Cheers, >>> Alex >>> >>> >>> On Thu, Jun 5, 2014 at 9:47 AM, Botao Sun <botao.sun(a)linaro.org> wrote: >>> >>>> + Linaro Kernel and Samsung Landing Team >>>> >>>> Hi Alexandru, >>>> >>>> As I know for the Linux mainline Kernel, we can run make menuconfig >>>> then search the keyword by typing "/" and USB_SERIAL. >>>> >>>> Since we already have Linaro Samsung Arndale Kernel config file, then >>>> it would be better to use this file and modify USB_SERIAL related items >>>> later: >>>> >>>> >>>> https://www.kernel.org/doc/index-old.html#Using_an_existing_configuration >>>> >>>> FYI. >>>> >>>> Thanks. >>>> >>>> >>>> Best Regards >>>> Botao Sun >>>> >>>> >>>> On 5 June 2014 07:11, Alexandru Rosca <srosca(a)bu.edu> wrote: >>>> >>>>> Dear Botao Sun, >>>>> >>>>> I have an arndale board for which I would like to communicate with >>>>> serially via an FTDI and some microcontrollers. It seems that the linaro >>>>> kernel does not support this. I was thinking of compiling a kernel with the >>>>> USB SERIAL config option set. Could you advise me on how to do this? Can I >>>>> just use the config file for the arndale and modify it for compilation? >>>>> >>>>> Thank you, >>>>> Sasha >>>>> >>>> >>>> >>> >> >

10 years, 8 months

[PATCH 1/2] timer: store cpu-number in 'struct tvec_base'

by Viresh Kumar

When a timer is enqueued or modified on a NO_HZ_FULL target (local or remote), the target is expected to re-evaluate its timer wheel to decide if tick must be restarted to handle timer expirations. If it doesn't re-evaluate timer wheel and restart tick, it wouldn't be able to call timer's handler on its expiration. It would be delayed until the time tick is restarted again. Currently the max delay can be 1 second as returned by scheduler_tick_max_deferment(), but it can increase in future. To handle this, currently we are calling wake_up_nohz_cpu() from add_timer_on() but what about timers enqueued/modified with other APIs? For example, in __mod_timer() we get target cpu (where the timer should get enqueued) by calling get_nohz_timer_target() and it is free to return a NO_HZ_FULL cpu as well. So, we *should* re-evaluate timer wheel there as well, otherwise call to timer's handler might be delayed as explained earlier. In order to fix this issue we can move wake_up_nohz_cpu(cpu) to internal_add_timer() so that it is well handled for any add-timer API. LKML discussion about this: https://lkml.org/lkml/2014/6/4/169 This requires internal_add_timer() to get cpu number from per-cpu object 'base', as all the callers might not have cpu number to pass to internal_add_timer(). For example, in __mod_timer() we find timer's base from 'timer' pointer and not from per-cpu arithmetic. Thus, this patch adds another field 'cpu' in 'struct tvec_base' which will store cpu number of the cpu it belongs to. Next patch will then move wake_up_nohz_cpu() to internal_add_timer(). Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> --- kernel/timer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/timer.c b/kernel/timer.c index 3bb01a3..9e5f4f2 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -82,6 +82,7 @@ struct tvec_base { unsigned long next_timer; unsigned long active_timers; unsigned long all_timers; + int cpu; struct tvec_root tv1; struct tvec tv2; struct tvec tv3; @@ -1568,6 +1569,7 @@ static int init_timers_cpu(int cpu) } spin_lock_init(&base->lock); tvec_base_done[cpu] = 1; + base->cpu = cpu; } else { base = per_cpu(tvec_bases, cpu); } -- 2.0.0.rc2

10 years, 8 months

Re: USB serial in ubuntu for arndale

by Botao Sun

Hi Alexandru, Here is the Linaro Kernel git repository list: https://git.linaro.org/?a=project_list;pf=kernel And which platform are you working on? Android or ubuntu? I ask because the Kernel version on Android is the old one: 3.9.1 FYI. On 5 June 2014 23:56, Alexandru Rosca <srosca(a)bu.edu> wrote: > Hi Botao, > > The instructions online for building and deploying a linux kernel seems to > be for version 3.1. I am using the latest arndale OS from the linaro > releases and would like to know which source code you suggest I compile > with the config file. > > Cheers, > Alex > > > On Thu, Jun 5, 2014 at 9:47 AM, Botao Sun <botao.sun(a)linaro.org> wrote: > >> + Linaro Kernel and Samsung Landing Team >> >> Hi Alexandru, >> >> As I know for the Linux mainline Kernel, we can run make menuconfig then >> search the keyword by typing "/" and USB_SERIAL. >> >> Since we already have Linaro Samsung Arndale Kernel config file, then it >> would be better to use this file and modify USB_SERIAL related items later: >> >> https://www.kernel.org/doc/index-old.html#Using_an_existing_configuration >> >> FYI. >> >> Thanks. >> >> >> Best Regards >> Botao Sun >> >> >> On 5 June 2014 07:11, Alexandru Rosca <srosca(a)bu.edu> wrote: >> >>> Dear Botao Sun, >>> >>> I have an arndale board for which I would like to communicate with >>> serially via an FTDI and some microcontrollers. It seems that the linaro >>> kernel does not support this. I was thinking of compiling a kernel with the >>> USB SERIAL config option set. Could you advise me on how to do this? Can I >>> just use the config file for the arndale and modify it for compilation? >>> >>> Thank you, >>> Sasha >>> >> >> >

10 years, 8 months

Re: USB serial in ubuntu for arndale

by Botao Sun

+ Linaro Kernel and Samsung Landing Team Hi Alexandru, As I know for the Linux mainline Kernel, we can run make menuconfig then search the keyword by typing "/" and USB_SERIAL. Since we already have Linaro Samsung Arndale Kernel config file, then it would be better to use this file and modify USB_SERIAL related items later: https://www.kernel.org/doc/index-old.html#Using_an_existing_configuration FYI. Thanks. Best Regards Botao Sun On 5 June 2014 07:11, Alexandru Rosca <srosca(a)bu.edu> wrote: > Dear Botao Sun, > > I have an arndale board for which I would like to communicate with > serially via an FTDI and some microcontrollers. It seems that the linaro > kernel does not support this. I was thinking of compiling a kernel with the > USB SERIAL config option set. Could you advise me on how to do this? Can I > just use the config file for the arndale and modify it for compilation? > > Thank you, > Sasha >

10 years, 8 months

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linaro-kernel June 2014