From: Andrii Nakryiko <andrii@kernel.org>
Date: Wed, 3 Jan 2024 18:41:22 +0000 (-0800)
Subject: Merge branch 'bpf-volatile-compare'
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b4560055c8f11c5e2cfffb4de928b3cfd4eae3b4;p=linux.git

Merge branch 'bpf-volatile-compare'

Alexei Starovoitov says:

====================
bpf: volatile compare

From: Alexei Starovoitov <ast@kernel.org>

v2->v3:
Debugged profiler.c regression. It was caused by basic block layout.
Introduce bpf_cmp_likely() and bpf_cmp_unlikely() macros.
Debugged redundant <<=32, >>=32 with u32 variables. Added cast workaround.

v1->v2:
Fixed issues pointed out by Daniel, added more tests, attempted to convert profiler.c,
but barrier_var() wins vs bpf_cmp(). To be investigated.
Patches 1-4 are good to go, but 5 needs more work.
====================

Link: https://lore.kernel.org/r/20231226191148.48536-1-alexei.starovoitov@gmail.com
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
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b4560055c8f11c5e2cfffb4de928b3cfd4eae3b4