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/base/regmap/Makefile | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 drivers/base/regmap/Makefile (limited to 'drivers/base/regmap/Makefile') diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile new file mode 100644 index 000000000..5fdd0845b --- /dev/null +++ b/drivers/base/regmap/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 +# For include/trace/define_trace.h to include trace.h +CFLAGS_regmap.o := -I$(src) + +obj-$(CONFIG_REGMAP) += regmap.o regcache.o +obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-flat.o regcache-maple.o +obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o +obj-$(CONFIG_REGMAP_KUNIT) += regmap-kunit.o +obj-$(CONFIG_REGMAP_AC97) += regmap-ac97.o +obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o +obj-$(CONFIG_REGMAP_RAM) += regmap-ram.o regmap-raw-ram.o +obj-$(CONFIG_REGMAP_SLIMBUS) += regmap-slimbus.o +obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o +obj-$(CONFIG_REGMAP_SPMI) += regmap-spmi.o +obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o +obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o +obj-$(CONFIG_REGMAP_W1) += regmap-w1.o +obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o +obj-$(CONFIG_REGMAP_SOUNDWIRE_MBQ) += regmap-sdw-mbq.o +obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o +obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o +obj-$(CONFIG_REGMAP_SPI_AVMM) += regmap-spi-avmm.o +obj-$(CONFIG_REGMAP_MDIO) += regmap-mdio.o +obj-$(CONFIG_REGMAP_FSI) += regmap-fsi.o -- cgit v1.3.1