From dd05add7b2b6004c5fa3a1f276f56d8668f86b65 Mon Sep 17 00:00:00 2001 From: Paulo Alcantara Date: Sat, 26 Sep 2026 19:20:30 -0300 Subject: netfs: zero the tail of a short DIO/unbuffered read The buffered read collector zero-fills the tail of a short read that stops below the inode's i_size (netfs_clear_unread()), so a read that races an extending write still returns the expected number of bytes. The non-buffered collector path does no such thing: it just records how much was transferred. Add the same zero-fill for the non-buffered case, gated on NETFS_SREQ_CLEAR_TAIL: a subreq's source sets that flag when a short result from it is known to be safe to treat as a hole, as opposed to NETFS_SREQ_HIT_EOF, which means the read genuinely ran off the end of the file and should be reported short as-is. Only CLEAR_TAIL should zero-fill here; a real EOF must stay a real short read. No source currently sets CLEAR_TAIL on an unbuffered/DIO subrequest, so this is inert on its own -- a following change teaches cifs to set it in the one case that needs it. Fixes: e2d46f2ec332 ("netfs: Change the read result collector to only use one work item") Reviewed-by: David Howells Reviewed-by: Namjae Jeon Signed-off-by: Paulo Alcantara Cc: Christian Brauner Cc: Matthew Wilcox Cc: Ronnie Sahlberg Cc: Shyam Prasad N Cc: Tom Talpey Cc: Bharath SM Cc: stable@vger.kernel.org --- drivers/devfreq/Makefile | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 drivers/devfreq/Makefile (limited to 'drivers/devfreq/Makefile') diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile new file mode 100644 index 000000000..404179d79 --- /dev/null +++ b/drivers/devfreq/Makefile @@ -0,0 +1,21 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ_EVENT) += devfreq-event.o +obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o +obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o +obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o +obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o +obj-$(CONFIG_DEVFREQ_GOV_PASSIVE) += governor_passive.o + +# DEVFREQ Drivers +obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ) += exynos-bus.o +obj-$(CONFIG_ARM_HISI_UNCORE_DEVFREQ) += hisi_uncore_freq.o +obj-$(CONFIG_ARM_IMX_BUS_DEVFREQ) += imx-bus.o +obj-$(CONFIG_ARM_IMX8M_DDRC_DEVFREQ) += imx8m-ddrc.o +obj-$(CONFIG_ARM_MEDIATEK_CCI_DEVFREQ) += mtk-cci-devfreq.o +obj-$(CONFIG_ARM_RK3399_DMC_DEVFREQ) += rk3399_dmc.o +obj-$(CONFIG_ARM_SUN8I_A33_MBUS_DEVFREQ) += sun8i-a33-mbus.o +obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra30-devfreq.o + +# DEVFREQ Event Drivers +obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/ -- cgit v1.3.1