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x86/alternatives: Add documentation for smp_text_poke_batch_add()

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250411054105.2341982-39-mingo@kernel.org
This commit is contained in:
Ingo Molnar
2025-04-11 07:40:50 +02:00
parent 9647ce4652
commit cca3473956
1 changed files with 13 additions and 0 deletions
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13
arch/x86/kernel/alternative.c
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@@ -2873,6 +2873,19 @@ static void smp_text_poke_batch_flush(void *addr)
}
}
/**
* smp_text_poke_batch_add() -- update instruction on live kernel on SMP, batched
* @addr: address to patch
* @opcode: opcode of new instruction
* @len: length to copy
* @emulate: instruction to be emulated
*
* Add a new instruction to the current queue of to-be-patched instructions
* the kernel maintains. The patching request will not be executed immediately,
* but becomes part of an array of patching requests, optimized for batched
* execution. All pending patching requests will be executed on the next
* smp_text_poke_batch_finish() call.
*/
void __ref smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, const void *emulate)
{
smp_text_poke_batch_flush(addr);