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| author | Konstantin Belousov <kib@FreeBSD.org> | 2022-08-25 23:41:48 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2022-08-25 23:41:48 +0000 |
| commit | c1a0ab5ec525c4cb2dee4aad72d27f195e21450c (patch) | |
| tree | 656ff211731612417860734be2312e1a4204df3b /sys/amd64/amd64 | |
| parent | 08aba0aec7b7f676ccc3f7886f59f277d668d5b4 (diff) | |
| download | src-c1a0ab5ec525c4cb2dee4aad72d27f195e21450c.tar.gz src-c1a0ab5ec525c4cb2dee4aad72d27f195e21450c.zip | |
amd64: update comment for casueword/casueword32, mentioning return value 1
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Diffstat (limited to 'sys/amd64/amd64')
| -rw-r--r-- | sys/amd64/amd64/support.S | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/amd64/amd64/support.S b/sys/amd64/amd64/support.S index 8e284c6f6a9e..223a9cc7f444 100644 --- a/sys/amd64/amd64/support.S +++ b/sys/amd64/amd64/support.S @@ -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) |