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17 May 2024, 11:00:25 UTC
Revision 765dcd209947e7b3666c08fb109ab8b879f7a471 authored by Marco Elver on 26 November 2019, 14:04:05 UTC, committed by Thomas Gleixner on 11 June 2020, 06:03:24 UTC 
asm-generic/atomic: Use __always_inline for fallback wrappers
 
Use __always_inline for atomic fallback wrappers. When building for size
(CC_OPTIMIZE_FOR_SIZE), some compilers appear to be less inclined to
inline even relatively small static inline functions that are assumed to
be inlinable such as atomic ops. This can cause problems, for example in
UACCESS regions.

While the fallback wrappers aren't pure wrappers, they are trivial
nonetheless, and the function they wrap should determine the final
inlining policy.

For x86 tinyconfig we observe:
- vmlinux baseline: 1315988
- vmlinux with patch: 1315928 (-60 bytes)

[ tglx: Cherry-picked from KCSAN ]

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
1 parent b29482f
History
Tip revision: 765dcd209947e7b3666c08fb109ab8b879f7a471 authored by Marco Elver on 26 November 2019, 14:04:05 UTC
asm-generic/atomic: Use __always_inline for fallback wrappers
Tip revision: 765dcd2
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