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| author | Jinjie Ruan <ruanjinjie@huawei.com> | 2026-09-02 15:47:59 +0800 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2026-09-17 11:49:47 +0200 |
| commit | 72d907f23ef092d63caac96ca3af6fcae4506008 (patch) | |
| tree | 059244fe2b02b9578f304ffcadc9211efd469e97 /tools/lib/python | |
| parent | 77ae27fd98f3b548797c9f22c10ab5cf1c4ada53 (diff) | |
| download | linux-next-72d907f23ef092d63caac96ca3af6fcae4506008.tar.gz linux-next-72d907f23ef092d63caac96ca3af6fcae4506008.zip | |
lib/vsprintf: Use acquire/release for ptr_key publication
Replace the smp_wmb() + WRITE_ONCE() and READ_ONCE() + smp_rmb() barrier
pair with smp_store_release()/smp_load_acquire() on filled_random_ptr_key.
This expresses the publish/subscribe pattern more clearly and allows
architectures with native acquire/release instructions (e.g. arm64's
STLR/LDAR) to avoid the cost of full one-way barriers (DMB ISHST/ISHLD).
No functional change intended.
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Assisted-by: DeepSeek:DeepSeek-V3
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20260902074805.398540-3-ruanjinjie@huawei.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions