From dfc007f7f7aab982a8c22cbcb783d72b0db99705 Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Mon, 2 May 2016 10:20:52 -0400 Subject: [PATCH] docs/atomics.txt: Update pointer to linux macro Add a missing end brace and update doc to point to the latest access macro. ACCESS_ONCE() is deprecated. Signed-off-by: Pranith Kumar Message-Id: <1462198852-28694-1-git-send-email-bobby.prani@gmail.com> Signed-off-by: Paolo Bonzini --- docs/atomics.txt | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/docs/atomics.txt b/docs/atomics.txt index ef285e3c2a..bba771ecd6 100644 --- a/docs/atomics.txt +++ b/docs/atomics.txt @@ -62,7 +62,7 @@ operations: typeof(*ptr) atomic_fetch_sub(ptr, val) typeof(*ptr) atomic_fetch_and(ptr, val) typeof(*ptr) atomic_fetch_or(ptr, val) - typeof(*ptr) atomic_xchg(ptr, val + typeof(*ptr) atomic_xchg(ptr, val) typeof(*ptr) atomic_cmpxchg(ptr, old, new) all of which return the old value of *ptr. These operations are @@ -328,7 +328,7 @@ and memory barriers, and the equivalents in QEMU: - atomic_read and atomic_set in Linux give no guarantee at all; atomic_read and atomic_set in QEMU include a compiler barrier - (similar to the ACCESS_ONCE macro in Linux). + (similar to the READ_ONCE/WRITE_ONCE macros in Linux). - most atomic read-modify-write operations in Linux return void; in QEMU, all of them return the old value of the variable. -- 2.11.4.GIT