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| author | Mark Rutland <mark.rutland@arm.com> | 2022-09-12 19:22:03 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-09-16 19:15:02 +0300 |
| commit | 92b4b5619f12770d455ae639ed4e773bdf01aff6 (patch) | |
| tree | 9d4620852cf5a0720f3ccd184cd40cb6202a43a7 /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | b90cb1053190353cc30f0fef0ef1f378ccc063c5 (diff) | |
| download | linux-92b4b5619f12770d455ae639ed4e773bdf01aff6.tar.xz | |
arm64: cpufeature: make cpus_have_cap() noinstr-safe
Currently it isn't safe to use cpus_have_cap() from noinstr code as
test_bit() is explicitly instrumented, and were cpus_have_cap() placed
out-of-line, cpus_have_cap() itself could be instrumented.
Make cpus_have_cap() noinstr safe by marking it __always_inline and
using arch_test_bit().
Aside from the prevention of instrumentation, there should be no
functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220912162210.3626215-2-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions