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| author | Matthew Wilcox <willy@linux.intel.com> | 2016-12-14 15:07:56 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-14 16:04:09 -0800 |
| commit | ebb9a9aedb95f697673a96a26ff0322a13676381 (patch) | |
| tree | 33cd935eb0dce081832d94bc05b5194af72244e0 /tools/include | |
| parent | 4b4bb46d00b386e1c972890dc5785a7966eaa9c0 (diff) | |
| download | linux-stable-ebb9a9aedb95f697673a96a26ff0322a13676381.tar.gz linux-stable-ebb9a9aedb95f697673a96a26ff0322a13676381.tar.bz2 linux-stable-ebb9a9aedb95f697673a96a26ff0322a13676381.zip | |
tools: add WARN_ON_ONCE
Patch series "Radix tree patches for 4.10", v3.
Mostly these are improvements; the only bug fixes in here relate to
multiorder entries (which are unused in the 4.9 tree).
This patch (of 32):
The radix tree uses its own buggy WARN_ON_ONCE. Replace it with the
definition from asm-generic/bug.h
Link: http://lkml.kernel.org/r/1480369871-5271-37-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Tested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/asm/bug.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/asm/bug.h b/tools/include/asm/bug.h index 9e5f4846967f..beda1a884b50 100644 --- a/tools/include/asm/bug.h +++ b/tools/include/asm/bug.h @@ -12,6 +12,17 @@ unlikely(__ret_warn_on); \ }) +#define WARN_ON_ONCE(condition) ({ \ + static int __warned; \ + int __ret_warn_once = !!(condition); \ + \ + if (unlikely(__ret_warn_once && !__warned)) { \ + __warned = true; \ + WARN_ON(1); \ + } \ + unlikely(__ret_warn_once); \ +}) + #define WARN_ONCE(condition, format...) ({ \ static int __warned; \ int __ret_warn_once = !!(condition); \ |