Breno Leitao 6784f27472 device_cgroup: remove branch hint after code refactor ... commit 4ef4ac3601 ("device_cgroup: avoid access to ->i_rdev in the common case in devcgroup_inode_permission()") reordered the checks in devcgroup_inode_permission() to check the inode mode before checking i_rdev, for better cache behavior. However, the likely() annotation on the i_rdev check was not updated to reflect the new code flow. Originally, when i_rdev was checked first, likely(!inode->i_rdev) made sense because most inodes were(?) regular files/directories, thus i_rdev == 0. After the reorder, by the time we reach the i_rdev check, we have already confirmed the inode IS a block or character device. Block and character special files are precisely defined by having a device number (i_rdev), so !inode->i_rdev is now the rare edge case, not the common case. Branch profiling confirmed this is 100% mispredicted: correct incorrect % Function File Line ------- --------- - -------- ---- ---- 0 2631904 100 devcgroup_inode_permission device_cgroup.h 24 Remove likely() to avoid giving the wrong hint to the CPU. Fixes: 4ef4ac3601 ("device_cgroup: avoid access to ->i_rdev in the common case in devcgroup_inode_permission()") Signed-off-by: Breno Leitao <leitao@debian.org> Link: https://patch.msgid.link/20260107-likely_device-v1-1-0c55f83a7e47@debian.org Reviewed-by: Mateusz Guzik <mjguzik@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>		2026-01-14 16:50:36 +01:00
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acpi
asm-generic	hyperv-next for v6.19	2025-12-09 06:10:17 +09:00
clocksource
crypto	This update includes the following changes:	2025-12-03 11:28:38 -08:00
cxl
drm	Cross-subsystem Changes:	2025-12-05 10:16:25 +10:00
dt-bindings	This pull request is entirely SoC clk drivers, not for lack of trying to modify	2025-12-08 09:38:52 +09:00
hyperv	mshv: Add definitions for MSHV sleep state configuration	2025-12-05 23:24:57 +00:00
keys
kunit
kvm
linux	device_cgroup: remove branch hint after code refactor	2026-01-14 16:50:36 +01:00
math-emu
media
memory
misc
net	- fix a bug with O_APPEND in cached mode causing data to be written multiple times on server	2025-12-07 08:29:09 -08:00
pcmcia
ras	Significant patch series in this merge are as follows:	2025-12-05 13:52:43 -08:00
rdma
rv	rv: Fix compilation if !CONFIG_RV_REACTORS	2025-12-02 12:33:37 -05:00
scsi
soc	This pull request is entirely SoC clk drivers, not for lack of trying to modify	2025-12-08 09:38:52 +09:00
sound	soundwire updates for 6.19	2025-12-13 16:26:55 +12:00
target
trace	We have a patch that adds an initial set of tracepoints to the MDS	2025-12-14 15:24:10 +12:00
uapi	sound fixes for 6.19-rc1	2025-12-13 16:09:10 +12:00
ufs
vdso
video
xen
Kbuild