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/Makefile | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 drivers/base/Makefile (limited to 'drivers/base/Makefile') diff --git a/drivers/base/Makefile b/drivers/base/Makefile new file mode 100644 index 000000000..435710f64 --- /dev/null +++ b/drivers/base/Makefile @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for the Linux device tree + +obj-y := component.o core.o bus.o dd.o syscore.o \ + driver.o class.o platform.o \ + cpu.o firmware.o init.o map.o devres.o \ + attribute_container.o transport_class.o \ + topology.o container.o property.o cacheinfo.o \ + swnode.o faux.o +obj-$(CONFIG_AUXILIARY_BUS) += auxiliary.o +obj-$(CONFIG_DEVTMPFS) += devtmpfs.o +obj-y += power/ +obj-$(CONFIG_ISA_BUS_API) += isa.o +obj-y += firmware_loader/ +obj-$(CONFIG_NUMA) += node.o +obj-$(CONFIG_MEMORY_HOTPLUG) += memory.o +ifeq ($(CONFIG_SYSFS),y) +obj-$(CONFIG_MODULES) += module.o +obj-$(CONFIG_AUXILIARY_BUS) += auxiliary_sysfs.o +endif +obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o +obj-$(CONFIG_REGMAP) += regmap/ +obj-$(CONFIG_SOC_BUS) += soc.o +obj-$(CONFIG_PINCTRL) += pinctrl.o +obj-$(CONFIG_DEV_COREDUMP) += devcoredump.o +obj-$(CONFIG_GENERIC_MSI_IRQ) += platform-msi.o +obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += arch_topology.o +obj-$(CONFIG_ACPI) += physical_location.o + +obj-y += test/ + +ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG + +# define_trace.h needs to know how to find our header +CFLAGS_trace.o := -I$(src) +obj-$(CONFIG_TRACING) += trace.o -- cgit v1.3.1