Commit-ID: fc7bdc90249b216051d06496577c306327f2e3f5 Gitweb: https://git.kernel.org/tip/fc7bdc90249b216051d06496577c306327f2e3f5 Author: SeongJae Park <sj38.p...@gmail.com> AuthorDate: Mon, 14 May 2018 15:55:32 -0700 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 15 May 2018 08:11:14 +0200
locking/Documentation: Fix incorrect example code - Remove a stale line of code - Fix the condition of the READ_ONCE() example Signed-off-by: SeongJae Park <sj38.p...@gmail.com> Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com> Acked-by: Alan Stern <st...@rowland.harvard.edu> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: Will Deacon <will.dea...@arm.com> Cc: aki...@gmail.com Cc: boqun.f...@gmail.com Cc: dhowe...@redhat.com Cc: j.algl...@ucl.ac.uk Cc: linux-a...@vger.kernel.org Cc: luc.maran...@inria.fr Cc: npig...@gmail.com Cc: parri.and...@gmail.com Link: http://lkml.kernel.org/r/1526338533-6044-7-git-send-email-paul...@linux.vnet.ibm.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- Documentation/core-api/atomic_ops.rst | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Documentation/core-api/atomic_ops.rst b/Documentation/core-api/atomic_ops.rst index fce929144ccd..4ea4af71e68a 100644 --- a/Documentation/core-api/atomic_ops.rst +++ b/Documentation/core-api/atomic_ops.rst @@ -111,7 +111,6 @@ If the compiler can prove that do_something() does not store to the variable a, then the compiler is within its rights transforming this to the following:: - tmp = a; if (a > 0) for (;;) do_something(); @@ -119,7 +118,7 @@ the following:: If you don't want the compiler to do this (and you probably don't), then you should use something like the following:: - while (READ_ONCE(a) < 0) + while (READ_ONCE(a) > 0) do_something(); Alternatively, you could place a barrier() call in the loop.
