October 2024 - Linux-stable-mirror

patch "iio: adc: ad7944: add missing select IIO_(TRIGGERED_)BUFFER in" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: adc: ad7944: add missing select IIO_(TRIGGERED_)BUFFER in to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From f4dc96f05149d5e14d7a03c3b16171098847fee9 Mon Sep 17 00:00:00 2001 From: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Date: Thu, 3 Oct 2024 23:04:48 +0200 Subject: iio: adc: ad7944: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig This driver makes use of triggered buffers, but does not select the required modules. Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'. Fixes: d1efcf8871db ("iio: adc: ad7944: add driver for AD7944/AD7985/AD7986") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Reviewed-by: David Lechner <dlechner(a)baylibre.com> Link: https://patch.msgid.link/20241003-iio-select-v1-2-67c0385197cd@gmail.com Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/adc/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 97ece1a4b7e3..6790e62700fe 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -328,6 +328,8 @@ config AD7923 config AD7944 tristate "Analog Devices AD7944 and similar ADCs driver" depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices AD7944, AD7985, AD7986 ADCs. -- 2.47.0

8 months, 3 weeks

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patch "iio: accel: kx022a: add missing select IIO_(TRIGGERED_)BUFFER in" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: accel: kx022a: add missing select IIO_(TRIGGERED_)BUFFER in to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 96666f05d11acf0370cedca17a4c3ab6f9554b35 Mon Sep 17 00:00:00 2001 From: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Date: Thu, 3 Oct 2024 23:04:47 +0200 Subject: iio: accel: kx022a: add missing select IIO_(TRIGGERED_)BUFFER in Kconfig This driver makes use of triggered buffers, but does not select the required modules. Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'. Fixes: 7c1d1677b322 ("iio: accel: Support Kionix/ROHM KX022A accelerometer") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Acked-by: Matti Vaittinen <mazziesaccount(a)gmail.com> Link: https://patch.msgid.link/20241003-iio-select-v1-1-67c0385197cd@gmail.com Cc: <Stable(a)vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/accel/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 516c1a8e4d56..8c3f7cf55d5f 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -447,6 +447,8 @@ config IIO_ST_ACCEL_SPI_3AXIS config IIO_KX022A tristate + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER config IIO_KX022A_SPI tristate "Kionix KX022A tri-axis digital accelerometer SPI interface" -- 2.47.0

8 months, 3 weeks

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patch "iio: light: veml6030: fix ALS sensor resolution" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: light: veml6030: fix ALS sensor resolution to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From c9e9746f275c45108f2b0633a4855d65d9ae0736 Mon Sep 17 00:00:00 2001 From: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Date: Mon, 23 Sep 2024 00:17:49 +0200 Subject: iio: light: veml6030: fix ALS sensor resolution The driver still uses the sensor resolution provided in the datasheet until Rev. 1.6, 28-Apr-2022, which was updated with Rev 1.7, 28-Nov-2023. The original ambient light resolution has been updated from 0.0036 lx/ct to 0.0042 lx/ct, which is the value that can be found in the current device datasheet. Update the default resolution for IT = 100 ms and GAIN = 1/8 from the original 4608 mlux/cnt to the current value from the "Resolution and maximum detection range" table (Application Note 84367, page 5), 5376 mlux/cnt. Cc: <stable(a)vger.kernel.org> Fixes: 7b779f573c48 ("iio: light: add driver for veml6030 ambient light sensor") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> Link: https://patch.msgid.link/20240923-veml6035-v2-1-58c72a0df31c@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/light/veml6030.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/light/veml6030.c b/drivers/iio/light/veml6030.c index df2ba3078b91..9630de1c578e 100644 --- a/drivers/iio/light/veml6030.c +++ b/drivers/iio/light/veml6030.c @@ -779,7 +779,7 @@ static int veml6030_hw_init(struct iio_dev *indio_dev) /* Cache currently active measurement parameters */ data->cur_gain = 3; - data->cur_resolution = 4608; + data->cur_resolution = 5376; data->cur_integration_time = 3; return ret; -- 2.47.0

8 months, 3 weeks

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patch "iio: light: opt3001: add missing full-scale range value" added to char-misc-linus

by gregkh＠linuxfoundation.org

This is a note to let you know that I've just added the patch titled iio: light: opt3001: add missing full-scale range value to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. From 530688e39c644543b71bdd9cb45fdfb458a28eaa Mon Sep 17 00:00:00 2001 From: Emil Gedenryd <emil.gedenryd(a)axis.com> Date: Fri, 13 Sep 2024 11:57:02 +0200 Subject: iio: light: opt3001: add missing full-scale range value The opt3001 driver uses predetermined full-scale range values to determine what exponent to use for event trigger threshold values. The problem is that one of the values specified in the datasheet is missing from the implementation. This causes larger values to be scaled down to an incorrect exponent, effectively reducing the maximum settable threshold value by a factor of 2. Add missing full-scale range array value. Fixes: 94a9b7b1809f ("iio: light: add support for TI's opt3001 light sensor") Signed-off-by: Emil Gedenryd <emil.gedenryd(a)axis.com> Cc: <Stable(a)vger.kernel.org> Link: https://patch.msgid.link/20240913-add_opt3002-v2-1-69e04f840360@axis.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- drivers/iio/light/opt3001.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c index 887c4b776a86..176e54bb48c3 100644 --- a/drivers/iio/light/opt3001.c +++ b/drivers/iio/light/opt3001.c @@ -138,6 +138,10 @@ static const struct opt3001_scale opt3001_scales[] = { .val = 20966, .val2 = 400000, }, + { + .val = 41932, + .val2 = 800000, + }, { .val = 83865, .val2 = 600000, -- 2.47.0

8 months, 3 weeks

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[PATCH] soc: fsl: rcpm: fix missing of_node_put() in copy_ippdexpcr1_setting()

by Javier Carrasco

of_find_compatible_node() requires a call to of_node_put() when the pointer to the node is not required anymore to decrement its refcount and avoid leaking memory. Add the missing call to of_node_put() after the node has been used. Cc: stable(a)vger.kernel.org Fixes: e95f287deed2 ("soc: fsl: handle RCPM errata A-008646 on SoC LS1021A") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> --- drivers/soc/fsl/rcpm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/soc/fsl/rcpm.c b/drivers/soc/fsl/rcpm.c index 3d0cae30c769..06bd94b29fb3 100644 --- a/drivers/soc/fsl/rcpm.c +++ b/drivers/soc/fsl/rcpm.c @@ -36,6 +36,7 @@ static void copy_ippdexpcr1_setting(u32 val) return; regs = of_iomap(np, 0); + of_node_put(np); if (!regs) return; --- base-commit: d61a00525464bfc5fe92c6ad713350988e492b88 change-id: 20241013-rcpm-of_node_put-5e94e5bf1230 Best regards, -- Javier Carrasco <javier.carrasco.cruz(a)gmail.com>

8 months, 3 weeks

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[PATCH] firmware: tf: fix missing of_node_put() in of_register_trusted_foundation()

by Javier Carrasco

of_find_compatible_node() requires a call to of_node_put() when the pointer to the node is not required anymore to decrement its refcount and avoid leaking memory. Add the missing call to of_node_put() after the node has been used. Cc: stable(a)vger.kernel.org Fixes: d9a1beaa10e8 ("ARM: add basic support for Trusted Foundations") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> --- drivers/firmware/trusted_foundations.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/firmware/trusted_foundations.c b/drivers/firmware/trusted_foundations.c index 1389fa9418a7..e9fc79805c3e 100644 --- a/drivers/firmware/trusted_foundations.c +++ b/drivers/firmware/trusted_foundations.c @@ -175,6 +175,7 @@ void of_register_trusted_foundations(void) &pdata.version_minor); if (err != 0) panic("Trusted Foundation: missing version-minor property\n"); + of_node_put(node); register_trusted_foundations(&pdata); } --- base-commit: d61a00525464bfc5fe92c6ad713350988e492b88 change-id: 20241013-trusted_foundations-of_node_put-4b905f3ba009 Best regards, -- Javier Carrasco <javier.carrasco.cruz(a)gmail.com>

8 months, 3 weeks

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[PATCH] soc: imx8m: Fix missing refcount decrement in error path for np

by Javier Carrasco

An error path was introduced without including the required call to of_node_put() to decrement the node's refcount and avoid leaking memory. If the call to of_clk_get_by_name() for 'clk' fails, the probe returns without decrementing the refcount. Use the automatic cleanup facility to fix the bug and protect the code against new error paths where the call to of_node_put() might be missing again. Cc: stable(a)vger.kernel.org Fixes: 836fb30949d9 ("soc: imx8m: Enable OCOTP clock before reading the register") Signed-off-by: Javier Carrasco <javier.carrasco.cruz(a)gmail.com> --- drivers/soc/imx/soc-imx8m.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c index fe111bae38c8..ba8c0bdd60aa 100644 --- a/drivers/soc/imx/soc-imx8m.c +++ b/drivers/soc/imx/soc-imx8m.c @@ -99,12 +99,12 @@ static u32 __init imx8mq_soc_revision(void) static void __init imx8mm_soc_uid(void) { void __iomem *ocotp_base; - struct device_node *np; + struct device_node *np __free(device_node) = + of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp"); struct clk *clk; u32 offset = of_machine_is_compatible("fsl,imx8mp") ? IMX8MP_OCOTP_UID_OFFSET : 0; - np = of_find_compatible_node(NULL, NULL, "fsl,imx8mm-ocotp"); if (!np) return; @@ -125,7 +125,6 @@ static void __init imx8mm_soc_uid(void) clk_disable_unprepare(clk); clk_put(clk); iounmap(ocotp_base); - of_node_put(np); } static u32 __init imx8mm_soc_revision(void) --- base-commit: d61a00525464bfc5fe92c6ad713350988e492b88 change-id: 20241013-soc-imx8m-of_node_put-526a1c8ab540 Best regards, -- Javier Carrasco <javier.carrasco.cruz(a)gmail.com>

8 months, 3 weeks

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[PATCH 6.1+] HID: multitouch: Add support for lenovo Y9000P Touchpad

by WangYuli

From: He Lugang <helugang(a)uniontech.com> [ Upstream commit 251efae73bd46b097deec4f9986d926813aed744 ] The 2024 Lenovo Y9000P which use GT7868Q chip also needs a fixup. The information of the chip is as follows: I2C HID v1.00 Mouse [GXTP5100:00 27C6:01E0] Signed-off-by: He Lugang <helugang(a)uniontech.com> Signed-off-by: Jiri Kosina <jkosina(a)suse.com> Signed-off-by: WangYuli <wangyuli(a)uniontech.com> --- drivers/hid/hid-ids.h | 1 + drivers/hid/hid-multitouch.c | 8 ++++++-- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h index 06104a4e0fdc..86820a3d9766 100644 --- a/drivers/hid/hid-ids.h +++ b/drivers/hid/hid-ids.h @@ -505,6 +505,7 @@ #define USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100 0xe100 #define I2C_VENDOR_ID_GOODIX 0x27c6 +#define I2C_DEVICE_ID_GOODIX_01E0 0x01e0 #define I2C_DEVICE_ID_GOODIX_01E8 0x01e8 #define I2C_DEVICE_ID_GOODIX_01E9 0x01e9 #define I2C_DEVICE_ID_GOODIX_01F0 0x01f0 diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index c4a6908bbe54..847462650549 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -1446,7 +1446,8 @@ static __u8 *mt_report_fixup(struct hid_device *hdev, __u8 *rdesc, { if (hdev->vendor == I2C_VENDOR_ID_GOODIX && (hdev->product == I2C_DEVICE_ID_GOODIX_01E8 || - hdev->product == I2C_DEVICE_ID_GOODIX_01E9)) { + hdev->product == I2C_DEVICE_ID_GOODIX_01E9 || + hdev->product == I2C_DEVICE_ID_GOODIX_01E0)) { if (rdesc[607] == 0x15) { rdesc[607] = 0x25; dev_info( @@ -2065,7 +2066,10 @@ static const struct hid_device_id mt_devices[] = { I2C_DEVICE_ID_GOODIX_01E8) }, { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU, HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX, - I2C_DEVICE_ID_GOODIX_01E8) }, + I2C_DEVICE_ID_GOODIX_01E9) }, + { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU, + HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX, + I2C_DEVICE_ID_GOODIX_01E0) }, /* GoodTouch panels */ { .driver_data = MT_CLS_NSMU, -- 2.45.2

8 months, 3 weeks

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FAILED: patch "[PATCH] lockdep: fix deadlock issue between lockdep and rcu" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x a6f88ac32c6e63e69c595bfae220d8641704c9b7 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024100226-unselfish-triangle-e5eb@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: a6f88ac32c6e ("lockdep: fix deadlock issue between lockdep and rcu") 61cc4534b655 ("locking/lockdep: Avoid potential access of invalid memory in lock_class") 248efb2158f1 ("locking/lockdep: Rework lockdep_lock") 10476e630422 ("locking/lockdep: Fix bad recursion pattern") 25016bd7f4ca ("locking/lockdep: Avoid recursion in lockdep_count_{for,back}ward_deps()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From a6f88ac32c6e63e69c595bfae220d8641704c9b7 Mon Sep 17 00:00:00 2001 From: Zhiguo Niu <zhiguo.niu(a)unisoc.com> Date: Thu, 20 Jun 2024 22:54:34 +0000 Subject: [PATCH] lockdep: fix deadlock issue between lockdep and rcu There is a deadlock scenario between lockdep and rcu when rcu nocb feature is enabled, just as following call stack: rcuop/x -000|queued_spin_lock_slowpath(lock = 0xFFFFFF817F2A8A80, val = ?) -001|queued_spin_lock(inline) // try to hold nocb_gp_lock -001|do_raw_spin_lock(lock = 0xFFFFFF817F2A8A80) -002|__raw_spin_lock_irqsave(inline) -002|_raw_spin_lock_irqsave(lock = 0xFFFFFF817F2A8A80) -003|wake_nocb_gp_defer(inline) -003|__call_rcu_nocb_wake(rdp = 0xFFFFFF817F30B680) -004|__call_rcu_common(inline) -004|call_rcu(head = 0xFFFFFFC082EECC28, func = ?) -005|call_rcu_zapped(inline) -005|free_zapped_rcu(ch = ?)// hold graph lock -006|rcu_do_batch(rdp = 0xFFFFFF817F245680) -007|nocb_cb_wait(inline) -007|rcu_nocb_cb_kthread(arg = 0xFFFFFF817F245680) -008|kthread(_create = 0xFFFFFF80803122C0) -009|ret_from_fork(asm) rcuop/y -000|queued_spin_lock_slowpath(lock = 0xFFFFFFC08291BBC8, val = 0) -001|queued_spin_lock() -001|lockdep_lock() -001|graph_lock() // try to hold graph lock -002|lookup_chain_cache_add() -002|validate_chain() -003|lock_acquire -004|_raw_spin_lock_irqsave(lock = 0xFFFFFF817F211D80) -005|lock_timer_base(inline) -006|mod_timer(inline) -006|wake_nocb_gp_defer(inline)// hold nocb_gp_lock -006|__call_rcu_nocb_wake(rdp = 0xFFFFFF817F2A8680) -007|__call_rcu_common(inline) -007|call_rcu(head = 0xFFFFFFC0822E0B58, func = ?) -008|call_rcu_hurry(inline) -008|rcu_sync_call(inline) -008|rcu_sync_func(rhp = 0xFFFFFFC0822E0B58) -009|rcu_do_batch(rdp = 0xFFFFFF817F266680) -010|nocb_cb_wait(inline) -010|rcu_nocb_cb_kthread(arg = 0xFFFFFF817F266680) -011|kthread(_create = 0xFFFFFF8080363740) -012|ret_from_fork(asm) rcuop/x and rcuop/y are rcu nocb threads with the same nocb gp thread. This patch release the graph lock before lockdep call_rcu. Fixes: a0b0fd53e1e6 ("locking/lockdep: Free lock classes that are no longer in use") Cc: stable(a)vger.kernel.org Cc: Boqun Feng <boqun.feng(a)gmail.com> Cc: Waiman Long <longman(a)redhat.com> Cc: Carlos Llamas <cmllamas(a)google.com> Cc: Bart Van Assche <bvanassche(a)acm.org> Signed-off-by: Zhiguo Niu <zhiguo.niu(a)unisoc.com> Signed-off-by: Xuewen Yan <xuewen.yan(a)unisoc.com> Reviewed-by: Waiman Long <longman(a)redhat.com> Reviewed-by: Carlos Llamas <cmllamas(a)google.com> Reviewed-by: Bart Van Assche <bvanassche(a)acm.org> Signed-off-by: Carlos Llamas <cmllamas(a)google.com> Acked-by: Paul E. McKenney <paulmck(a)kernel.org> Signed-off-by: Boqun Feng <boqun.feng(a)gmail.com> Link: https://lore.kernel.org/r/20240620225436.3127927-1-cmllamas@google.com diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 266f57f36f69..b172ead28f1c 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -6186,25 +6186,27 @@ static struct pending_free *get_pending_free(void) static void free_zapped_rcu(struct rcu_head *cb); /* - * Schedule an RCU callback if no RCU callback is pending. Must be called with - * the graph lock held. - */ -static void call_rcu_zapped(struct pending_free *pf) +* See if we need to queue an RCU callback, must called with +* the lockdep lock held, returns false if either we don't have +* any pending free or the callback is already scheduled. +* Otherwise, a call_rcu() must follow this function call. +*/ +static bool prepare_call_rcu_zapped(struct pending_free *pf) { WARN_ON_ONCE(inside_selftest()); if (list_empty(&pf->zapped)) - return; + return false; if (delayed_free.scheduled) - return; + return false; delayed_free.scheduled = true; WARN_ON_ONCE(delayed_free.pf + delayed_free.index != pf); delayed_free.index ^= 1; - call_rcu(&delayed_free.rcu_head, free_zapped_rcu); + return true; } /* The caller must hold the graph lock. May be called from RCU context. */ @@ -6230,6 +6232,7 @@ static void free_zapped_rcu(struct rcu_head *ch) { struct pending_free *pf; unsigned long flags; + bool need_callback; if (WARN_ON_ONCE(ch != &delayed_free.rcu_head)) return; @@ -6241,14 +6244,18 @@ static void free_zapped_rcu(struct rcu_head *ch) pf = delayed_free.pf + (delayed_free.index ^ 1); __free_zapped_classes(pf); delayed_free.scheduled = false; - - /* - * If there's anything on the open list, close and start a new callback. - */ - call_rcu_zapped(delayed_free.pf + delayed_free.index); - + need_callback = + prepare_call_rcu_zapped(delayed_free.pf + delayed_free.index); lockdep_unlock(); raw_local_irq_restore(flags); + + /* + * If there's pending free and its callback has not been scheduled, + * queue an RCU callback. + */ + if (need_callback) + call_rcu(&delayed_free.rcu_head, free_zapped_rcu); + } /* @@ -6288,6 +6295,7 @@ static void lockdep_free_key_range_reg(void *start, unsigned long size) { struct pending_free *pf; unsigned long flags; + bool need_callback; init_data_structures_once(); @@ -6295,10 +6303,11 @@ static void lockdep_free_key_range_reg(void *start, unsigned long size) lockdep_lock(); pf = get_pending_free(); __lockdep_free_key_range(pf, start, size); - call_rcu_zapped(pf); + need_callback = prepare_call_rcu_zapped(pf); lockdep_unlock(); raw_local_irq_restore(flags); - + if (need_callback) + call_rcu(&delayed_free.rcu_head, free_zapped_rcu); /* * Wait for any possible iterators from look_up_lock_class() to pass * before continuing to free the memory they refer to. @@ -6392,6 +6401,7 @@ static void lockdep_reset_lock_reg(struct lockdep_map *lock) struct pending_free *pf; unsigned long flags; int locked; + bool need_callback = false; raw_local_irq_save(flags); locked = graph_lock(); @@ -6400,11 +6410,13 @@ static void lockdep_reset_lock_reg(struct lockdep_map *lock) pf = get_pending_free(); __lockdep_reset_lock(pf, lock); - call_rcu_zapped(pf); + need_callback = prepare_call_rcu_zapped(pf); graph_unlock(); out_irq: raw_local_irq_restore(flags); + if (need_callback) + call_rcu(&delayed_free.rcu_head, free_zapped_rcu); } /* @@ -6448,6 +6460,7 @@ void lockdep_unregister_key(struct lock_class_key *key) struct pending_free *pf; unsigned long flags; bool found = false; + bool need_callback = false; might_sleep(); @@ -6468,11 +6481,14 @@ void lockdep_unregister_key(struct lock_class_key *key) if (found) { pf = get_pending_free(); __lockdep_free_key_range(pf, key, 1); - call_rcu_zapped(pf); + need_callback = prepare_call_rcu_zapped(pf); } lockdep_unlock(); raw_local_irq_restore(flags); + if (need_callback) + call_rcu(&delayed_free.rcu_head, free_zapped_rcu); + /* Wait until is_dynamic_key() has finished accessing k->hash_entry. */ synchronize_rcu(); }

8 months, 3 weeks

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+ mm-dont-install-pmd-mappings-when-thps-are-disabled-by-the-hw-process-vma.patch added to mm-hotfixes-unstable branch

by Andrew Morton

The patch titled Subject: mm: don't install PMD mappings when THPs are disabled by the hw/process/vma has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-dont-install-pmd-mappings-when-thps-are-disabled-by-the-hw-process-vma.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patche… This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: David Hildenbrand <david(a)redhat.com> Subject: mm: don't install PMD mappings when THPs are disabled by the hw/process/vma Date: Fri, 11 Oct 2024 12:24:45 +0200 We (or rather, readahead logic :) ) might be allocating a THP in the pagecache and then try mapping it into a process that explicitly disabled THP: we might end up installing PMD mappings. This is a problem for s390x KVM, which explicitly remaps all PMD-mapped THPs to be PTE-mapped in s390_enable_sie()->thp_split_mm(), before starting the VM. For example, starting a VM backed on a file system with large folios supported makes the VM crash when the VM tries accessing such a mapping using KVM. Is it also a problem when the HW disabled THP using TRANSPARENT_HUGEPAGE_UNSUPPORTED? At least on x86 this would be the case without X86_FEATURE_PSE. In the future, we might be able to do better on s390x and only disallow PMD mappings -- what s390x and likely TRANSPARENT_HUGEPAGE_UNSUPPORTED really wants. For now, fix it by essentially performing the same check as would be done in __thp_vma_allowable_orders() or in shmem code, where this works as expected, and disallow PMD mappings, making us fallback to PTE mappings. Link: https://lkml.kernel.org/r/20241011102445.934409-3-david@redhat.com Fixes: 793917d997df ("mm/readahead: Add large folio readahead") Signed-off-by: David Hildenbrand <david(a)redhat.com> Reported-by: Leo Fu <bfu(a)redhat.com> Tested-by: Thomas Huth <thuth(a)redhat.com> Cc: Thomas Huth <thuth(a)redhat.com> Cc: Matthew Wilcox (Oracle) <willy(a)infradead.org> Cc: Ryan Roberts <ryan.roberts(a)arm.com> Cc: Christian Borntraeger <borntraeger(a)linux.ibm.com> Cc: Janosch Frank <frankja(a)linux.ibm.com> Cc: Claudio Imbrenda <imbrenda(a)linux.ibm.com> Cc: Hugh Dickins <hughd(a)google.com> Cc: Kefeng Wang <wangkefeng.wang(a)huawei.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> --- mm/memory.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/mm/memory.c~mm-dont-install-pmd-mappings-when-thps-are-disabled-by-the-hw-process-vma +++ a/mm/memory.c @@ -4931,6 +4931,15 @@ vm_fault_t do_set_pmd(struct vm_fault *v pmd_t entry; vm_fault_t ret = VM_FAULT_FALLBACK; + /* + * It is too late to allocate a small folio, we already have a large + * folio in the pagecache: especially s390 KVM cannot tolerate any + * PMD mappings, but PTE-mapped THP are fine. So let's simply refuse any + * PMD mappings if THPs are disabled. + */ + if (thp_disabled_by_hw() || vma_thp_disabled(vma, vma->vm_flags)) + return ret; + if (!thp_vma_suitable_order(vma, haddr, PMD_ORDER)) return ret; _ Patches currently in -mm which might be from david(a)redhat.com are mm-dont-install-pmd-mappings-when-thps-are-disabled-by-the-hw-process-vma.patch selftests-mm-hugetlb_fault_after_madv-use-default-hguetlb-page-size.patch selftests-mm-hugetlb_fault_after_madv-improve-test-output.patch

8 months, 3 weeks

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Linux-stable-mirror October 2024