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x86/alternatives: Document 'smp_text_poke_single()'

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Extend the documentation to better describe its purpose.

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/20250411054105.2341982-38-mingo@kernel.org
This commit is contained in:
Ingo Molnar 2025-04-11 07:40:49 +02:00
parent 8a6a1b4e0e
commit 9647ce4652
1 changed files with 3 additions and 2 deletions
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arch/x86/kernel/alternative.c
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@ -2880,7 +2880,7 @@ void __ref smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, c
}
/**
* smp_text_poke_single() -- update instructions on live kernel on SMP
* smp_text_poke_single() -- update instruction on live kernel on SMP immediately
* @addr: address to patch
* @opcode: opcode of new instruction
* @len: length to copy
@ -2888,7 +2888,8 @@ void __ref smp_text_poke_batch_add(void *addr, const void *opcode, size_t len, c
*
* Update a single instruction with the vector in the stack, avoiding
* dynamically allocated memory. This function should be used when it is
* not possible to allocate memory.
* not possible to allocate memory for a vector. The single instruction
* is patched in immediately.
*/
void __ref smp_text_poke_single(void *addr, const void *opcode, size_t len, const void *emulate)
{