X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=Documentation%2Fatomic_ops.txt;h=4ef245010457fc9301f21f6e78f2b1fc16c1d014;hb=fa93ca18a8b0da4e26bd9491ad144cd14d22f8ec;hp=f20c10c2858fc7c60f3003a77c905bf108dfddd7;hpb=fe2520094d88018423dfc42b3cd0015f74e8adea;p=linux-2.6-omap-h63xx.git diff --git a/Documentation/atomic_ops.txt b/Documentation/atomic_ops.txt index f20c10c2858..4ef24501045 100644 --- a/Documentation/atomic_ops.txt +++ b/Documentation/atomic_ops.txt @@ -186,7 +186,8 @@ If the atomic value v is not equal to u, this function adds a to v, and returns non zero. If v is equal to u then it returns zero. This is done as an atomic operation. -atomic_add_unless requires explicit memory barriers around the operation. +atomic_add_unless requires explicit memory barriers around the operation +unless it fails (returns 0). atomic_inc_not_zero, equivalent to atomic_add_unless(v, 1, 0)