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amd64: update comment for casueword/casueword32, mentioning return value 1

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Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
This commit is contained in:
Konstantin Belousov 2022-08-26 02:41:48 +03:00
parent 08aba0aec7
commit c1a0ab5ec5
1 changed files with 4 additions and 2 deletions
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6
sys/amd64/amd64/support.S
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@ -922,7 +922,8 @@ copy_fault:
/*
* casueword32. Compare and set user integer. Returns -1 on fault,
* 0 if access was successful. Old value is written to *oldp.
* 0 if access was successful, and 1 when comparision failed.
* Old value is written to *oldp.
* dst = %rdi, old = %esi, oldp = %rdx, new = %ecx
*/
ENTRY(casueword32_nosmap)
@ -1001,7 +1002,8 @@ END(casueword32_smap)
/*
* casueword. Compare and set user long. Returns -1 on fault,
* 0 if access was successful. Old value is written to *oldp.
* 0 if access was successful, and 1 when comparision failed.
* Old value is written to *oldp.
* dst = %rdi, old = %rsi, oldp = %rdx, new = %rcx
*/
ENTRY(casueword_nosmap)