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author | Mark Rutland <mark.rutland@arm.com> | 2023-06-05 08:01:05 +0100 |
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committer | Peter Zijlstra <peterz@infradead.org> | 2023-06-05 09:57:16 +0200 |
commit | e50f06ce2d876c740993b5e3d01e203520391ccd (patch) | |
tree | fc2684de513baaf5d20fde0d2b29ea23afa5c008 /drivers/net | |
parent | 8ad17f2183fd7e37ceafddbdff334a3e2608cc84 (diff) |
locking/atomic: m68k: add preprocessor symbols
Some atomics can be implemented in several different ways, e.g.
FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of
RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms
of FULL ordered atomics. Other atomics are optional, and don't exist in
some configurations (e.g. not all architectures implement the 128-bit
cmpxchg ops).
Subsequent patches will require that architectures define a preprocessor
symbol for any atomic (or ordering variant) which is optional. This will
make the fallback ifdeffery more robust, and simplify future changes.
Add the required definitions to arch/m68k.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230605070124.3741859-9-mark.rutland@arm.com
Diffstat (limited to 'drivers/net')
0 files changed, 0 insertions, 0 deletions