linaro-kernel March 2015

linaro-kernel@lists.linaro.org

58 participants
126 discussions

next-20150303 build: 2 failures 26 warnings (next-20150303)

by Build bot for Mark Brown

Tree/Branch: next-20150303 Git describe: next-20150303 Commit: 3d2f3b1026 Add linux-next specific files for 20150303 Build Time: 20 min 40 sec Passed: 6 / 8 ( 75.00 %) Failed: 2 / 8 ( 25.00 %) Errors: 2 Warnings: 26 Section Mismatches: 0 Failed defconfigs: arm64-allmodconfig arm-allmodconfig Errors: arm-allmodconfig ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] ------------------------------------------------------------------------------- defconfigs with issues (other than build errors): 19 warnings 0 mismatches : arm64-allmodconfig 10 warnings 0 mismatches : arm-allmodconfig 4 warnings 0 mismatches : arm64-defconfig ------------------------------------------------------------------------------- Errors summary: 2 1 ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] 1 ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] Warnings Summary: 26 2 ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] 2 ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') 2 ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast 2 ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast 2 ../drivers/of/overlay.c:89:31: warning: unused variable 'grandchild' [-Wunused-variable] 1 ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] 1 ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined 1 ../drivers/regulator/wm8350-regulator.c:1154:17: warning: unused variable 'wm8350' [-Wunused-variable] 1 ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] 1 ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] 1 ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../drivers/mmc/host/sh_mmcif.c:402:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/mmc/host/sh_mmcif.c:401:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined 1 ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined 1 ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined 1 ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] =============================================================================== Detailed per-defconfig build reports below: ------------------------------------------------------------------------------- arm64-allmodconfig : FAIL, 0 errors, 19 warnings, 0 section mismatches Warnings: ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined ../drivers/mmc/host/sh_mmcif.c:401:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/mmc/host/sh_mmcif.c:402:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] ../drivers/of/overlay.c:89:31: warning: unused variable 'grandchild' [-Wunused-variable] ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ------------------------------------------------------------------------------- arm-allmodconfig : FAIL, 2 errors, 10 warnings, 0 section mismatches Errors: ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] Warnings: ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/of/overlay.c:89:31: warning: unused variable 'grandchild' [-Wunused-variable] ../drivers/regulator/wm8350-regulator.c:1154:17: warning: unused variable 'wm8350' [-Wunused-variable] ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm64-defconfig : PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ------------------------------------------------------------------------------- Passed with no errors, warnings or mismatches: arm64-allnoconfig x86_64-allnoconfig arm-allnoconfig arm-multi_v7_defconfig x86_64-defconfig

10 years

[PATCH] kdb: Fix handling of kallsyms_symbol_next() return value

by Daniel Thompson

kallsyms_symbol_next() returns a boolean (true on success). Currently kdb_read() tests the return value with an inequality that unconditionally evaluates to true. This is fixed in the obvious way and, since the conditional branch is supposed to be unreachable, we also add a WARN_ON(). Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com> Signed-off-by: Daniel Thompson <daniel.thompson(a)linaro.org> --- kernel/debug/kdb/kdb_io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c index fc1ef73..77777d9 100644 --- a/kernel/debug/kdb/kdb_io.c +++ b/kernel/debug/kdb/kdb_io.c @@ -349,7 +349,7 @@ poll_again: } kdb_printf("\n"); for (i = 0; i < count; i++) { - if (kallsyms_symbol_next(p_tmp, i) < 0) + if (WARN_ON(!kallsyms_symbol_next(p_tmp, i))) break; kdb_printf("%s ", p_tmp); *(p_tmp + len) = '\0'; -- 2.1.0

10 years

master build: 0 failures 27 warnings (v4.0-rc1-178-g023a6007a08d)

by Build bot for Mark Brown

Tree/Branch: master Git describe: v4.0-rc1-178-g023a6007a08d Commit: 023a6007a0 Merge tag 'gpio-v4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio Build Time: 25 min 1 sec Passed: 8 / 8 (100.00 %) Failed: 0 / 8 ( 0.00 %) Errors: 0 Warnings: 27 Section Mismatches: 0 ------------------------------------------------------------------------------- defconfigs with issues (other than build errors): 21 warnings 0 mismatches : arm64-allmodconfig 8 warnings 0 mismatches : arm-allmodconfig 4 warnings 0 mismatches : arm64-defconfig ------------------------------------------------------------------------------- Warnings Summary: 27 2 ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] 2 ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') 2 ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast 2 ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast 1 ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] 1 ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] 1 ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined 1 ../drivers/spi/spi-s3c64xx.c:336:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/spi/spi-s3c64xx.c:327:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] 1 ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] 1 ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined 1 ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined 1 ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined 1 ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] =============================================================================== Detailed per-defconfig build reports below: ------------------------------------------------------------------------------- arm64-allmodconfig : PASS, 0 errors, 21 warnings, 0 section mismatches Warnings: ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ../drivers/spi/spi-s3c64xx.c:327:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/spi/spi-s3c64xx.c:336:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ------------------------------------------------------------------------------- arm-allmodconfig : PASS, 0 errors, 8 warnings, 0 section mismatches Warnings: ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm64-defconfig : PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ------------------------------------------------------------------------------- Passed with no errors, warnings or mismatches: arm64-allnoconfig x86_64-allnoconfig arm-allnoconfig arm-multi_v7_defconfig x86_64-defconfig

10 years

[RFC PATCH] sched_clock: Avoid tearing during read from NMI

by Daniel Thompson

Currently it is possible for an NMI (or FIQ on ARM) to come in and read sched_clock() whilst update_sched_clock() has half updated the state. This results in a bad time value being observed. This patch fixes that problem in a similar manner to Thomas Gleixner's 4396e058c52e("timekeeping: Provide fast and NMI safe access to CLOCK_MONOTONIC"). Note that ripping out the seqcount lock from sched_clock_register() and replacing it with a large comment is not nearly as bad as it looks! The locking here is actually pretty useless since most of the variables modified within the write lock are not covered by the read lock. As a result a big comment and the sequence bump implicit in the call to update_epoch() should work pretty much the same. Suggested-by: Stephen Boyd <sboyd(a)codeaurora.org> Signed-off-by: Daniel Thompson <daniel.thompson(a)linaro.org> --- Notes: This patch has only had fairly light testing at this point. However it survives basic tests. In particular I am running perf from FIQ/NMI and have instrumented it with some monotonicity tests none of which have reported any problem. kernel/time/sched_clock.c | 63 +++++++++++++++++++++++++++++++++++++---------- 1 file changed, 50 insertions(+), 13 deletions(-) diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c index 01d2d15aa662..485d5070259c 100644 --- a/kernel/time/sched_clock.c +++ b/kernel/time/sched_clock.c @@ -27,6 +27,10 @@ struct clock_data { u32 mult; u32 shift; bool suspended; + + /* Used only temporarily whilst we are updating the primary copy */ + u64 old_epoch_ns; + u64 old_epoch_cyc; }; static struct hrtimer sched_clock_timer; @@ -67,9 +71,14 @@ unsigned long long notrace sched_clock(void) return cd.epoch_ns; do { - seq = raw_read_seqcount_begin(&cd.seq); - epoch_cyc = cd.epoch_cyc; - epoch_ns = cd.epoch_ns; + seq = raw_read_seqcount(&cd.seq); + if (likely(0 == (seq & 1))) { + epoch_cyc = cd.epoch_cyc; + epoch_ns = cd.epoch_ns; + } else { + epoch_cyc = cd.old_epoch_cyc; + epoch_ns = cd.old_epoch_ns; + } } while (read_seqcount_retry(&cd.seq, seq)); cyc = read_sched_clock(); @@ -78,6 +87,35 @@ unsigned long long notrace sched_clock(void) } /* + * Update the epoch without allowing sched_clock to observe + * a mismatched epoch pair even if called from NMI. + * + * We do this by maintaining and odd/even copy of the epoch data and + * steering sched_clock to one or the other using a sequence counter. + * In order to preserve the (average case) data cache profile of + * sched_clock the system reverts back to the even copy as soon as + * possible; the odd copy is used *only* during an update. + * + * The caller is responsible for avoiding simultaneous updates. + */ +static void notrace update_epoch(u64 cyc, u64 ns) +{ + /* Update the backup copy */ + cd.old_epoch_cyc = cd.epoch_cyc; + cd.old_epoch_ns = cd.epoch_ns; + + /* Force readers to use the backup (odd) copy */ + raw_write_seqcount_latch(&cd.seq); + + /* Update the primary copy */ + cd.epoch_cyc = cyc; + cd.epoch_ns = ns; + + /* Steer readers back the primary (even) copy */ + raw_write_seqcount_latch(&cd.seq); +} + +/* * Atomically update the sched_clock epoch. */ static void notrace update_sched_clock(void) @@ -91,12 +129,7 @@ static void notrace update_sched_clock(void) cyc_to_ns((cyc - cd.epoch_cyc) & sched_clock_mask, cd.mult, cd.shift); - raw_local_irq_save(flags); - raw_write_seqcount_begin(&cd.seq); - cd.epoch_ns = ns; - cd.epoch_cyc = cyc; - raw_write_seqcount_end(&cd.seq); - raw_local_irq_restore(flags); + update_epoch(cyc, ns); } static enum hrtimer_restart sched_clock_poll(struct hrtimer *hrt) @@ -135,16 +168,20 @@ void __init sched_clock_register(u64 (*read)(void), int bits, ns = cd.epoch_ns + cyc_to_ns((cyc - cd.epoch_cyc) & sched_clock_mask, cd.mult, cd.shift); - raw_write_seqcount_begin(&cd.seq); + /* + * sched_clock will report a bad value if it executes + * concurrently with the following code. No locking exists to + * prevent this; we rely mostly on this function being called + * early during kernel boot up before we have lots of other + * stuff going on. + */ read_sched_clock = read; sched_clock_mask = new_mask; cd.rate = rate; cd.wrap_kt = new_wrap_kt; cd.mult = new_mult; cd.shift = new_shift; - cd.epoch_cyc = new_epoch; - cd.epoch_ns = ns; - raw_write_seqcount_end(&cd.seq); + update_epoch(new_epoch, ns); r = rate; if (r >= 4000000) { -- 1.9.3

10 years

next-20150302 build: 1 failures 28 warnings (next-20150302)

by Build bot for Mark Brown

Tree/Branch: next-20150302 Git describe: next-20150302 Commit: 8bcbe02ae7 Add linux-next specific files for 20150302 Build Time: 26 min 0 sec Passed: 7 / 8 ( 87.50 %) Failed: 1 / 8 ( 12.50 %) Errors: 2 Warnings: 28 Section Mismatches: 0 Failed defconfigs: arm-allmodconfig Errors: arm-allmodconfig ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] ------------------------------------------------------------------------------- defconfigs with issues (other than build errors): 21 warnings 0 mismatches : arm64-allmodconfig 9 warnings 0 mismatches : arm-allmodconfig 4 warnings 0 mismatches : arm64-defconfig ------------------------------------------------------------------------------- Errors summary: 2 1 ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] 1 ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] Warnings Summary: 28 2 ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] 2 ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') 2 ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast 2 ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast 1 ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] 1 ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] 1 ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined 1 ../drivers/regulator/wm8350-regulator.c:1154:17: warning: unused variable 'wm8350' [-Wunused-variable] 1 ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] 1 ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] 1 ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../drivers/mmc/host/sh_mmcif.c:402:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/mmc/host/sh_mmcif.c:401:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined 1 ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined 1 ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined 1 ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] =============================================================================== Detailed per-defconfig build reports below: ------------------------------------------------------------------------------- arm64-allmodconfig : PASS, 0 errors, 21 warnings, 0 section mismatches Warnings: ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined ../drivers/mmc/host/sh_mmcif.c:401:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/mmc/host/sh_mmcif.c:402:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm-allmodconfig : FAIL, 2 errors, 9 warnings, 0 section mismatches Errors: ../drivers/platform/chrome/cros_ec_lpc.c:40:3: error: implicit declaration of function 'inb' [-Werror=implicit-function-declaration] ../drivers/platform/chrome/cros_ec_lpc.c:75:3: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration] Warnings: ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/regulator/wm8350-regulator.c:1154:17: warning: unused variable 'wm8350' [-Wunused-variable] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm64-defconfig : PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ------------------------------------------------------------------------------- Passed with no errors, warnings or mismatches: arm64-allnoconfig x86_64-allnoconfig arm-allnoconfig arm-multi_v7_defconfig x86_64-defconfig

10 years

master build: 0 failures 27 warnings (v4.0-rc1-151-ga38ecbbd0be0)

by Build bot for Mark Brown

Tree/Branch: master Git describe: v4.0-rc1-151-ga38ecbbd0be0 Commit: a38ecbbd0b Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Build Time: 24 min 13 sec Passed: 8 / 8 (100.00 %) Failed: 0 / 8 ( 0.00 %) Errors: 0 Warnings: 27 Section Mismatches: 0 ------------------------------------------------------------------------------- defconfigs with issues (other than build errors): 21 warnings 0 mismatches : arm64-allmodconfig 8 warnings 0 mismatches : arm-allmodconfig 4 warnings 0 mismatches : arm64-defconfig ------------------------------------------------------------------------------- Warnings Summary: 27 2 ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] 2 ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type 2 ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') 2 ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast 2 ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast 1 ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] 1 ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] 1 ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] 1 ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined 1 ../drivers/spi/spi-s3c64xx.c:336:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/spi/spi-s3c64xx.c:327:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] 1 ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] 1 ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] 1 ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined 1 ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] 1 ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined 1 ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined 1 ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] 1 ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] =============================================================================== Detailed per-defconfig build reports below: ------------------------------------------------------------------------------- arm64-allmodconfig : PASS, 0 errors, 21 warnings, 0 section mismatches Warnings: ../drivers/block/drbd/drbd_bitmap.c:482:0: warning: "BITS_PER_PAGE" redefined ../drivers/block/drbd/drbd_bitmap.c:483:0: warning: "BITS_PER_PAGE_MASK" redefined ../drivers/gpio/gpio-74xx-mmio.c:132:16: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../sound/soc/samsung/dmaengine.c:53:32: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../sound/soc/samsung/dmaengine.c:60:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/infiniband/hw/qib/qib_qp.c:44:0: warning: "BITS_PER_PAGE" redefined ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ../drivers/spi/spi-s3c64xx.c:327:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/spi/spi-s3c64xx.c:336:8: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] ../drivers/net/ethernet/dec/tulip/winbond-840.c:910:2: warning: #warning Processor architecture undefined [-Wcpp] ../drivers/net/ethernet/dec/tulip/tulip_core.c:101:2: warning: #warning Processor architecture undefined! [-Wcpp] ../drivers/staging/dgap/dgap.h:124:0: warning: "PCI_IO_SIZE" redefined ../drivers/staging/fbtft/fbtft-core.c:1004:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:63:4: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/staging/fbtft/fbtft-io.c:110:5: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' [-Wformat=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/usb/renesas_usbhs/common.c:482:25: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm-allmodconfig : PASS, 0 errors, 8 warnings, 0 section mismatches Warnings: ../arch/arm/mach-cns3xxx/pcie.c:266:1: warning: the frame size of 1080 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../arch/arm/include/asm/cmpxchg.h:205:3: warning: value computed is not used [-Wunused-value] ../lib/lz4/lz4hc_compress.c:514:1: warning: the frame size of 1480 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../fs/btrfs/disk-io.c:3927:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=] ../net/rds/iw_rdma.c:200:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/mtd/chips/cfi_cmdset_0020.c:651:1: warning: the frame size of 1208 bytes is larger than 1024 bytes [-Wframe-larger-than=] ../drivers/scsi/ips.c:210:2: warning: #warning "This driver has only been tested on the x86/ia64/x86_64 platforms" [-Wcpp] ../drivers/staging/sm7xxfb/sm7xxfb.c:117:19: warning: 'sm7xx_vga_setup' defined but not used [-Wunused-function] ------------------------------------------------------------------------------- arm64-defconfig : PASS, 0 errors, 4 warnings, 0 section mismatches Warnings: ../drivers/pci/host/pci-xgene.c:137:3: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:140:2: warning: return makes integer from pointer without a cast ../drivers/pci/host/pci-xgene.c:144:13: warning: initialization from incompatible pointer type ../drivers/pci/host/pci-xgene.c:144:13: warning: (near initialization for 'xgene_pcie_ops.map_bus') ------------------------------------------------------------------------------- Passed with no errors, warnings or mismatches: arm64-allnoconfig x86_64-allnoconfig arm-allnoconfig arm-multi_v7_defconfig x86_64-defconfig

10 years

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

linaro-kernel March 2015