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authorMatthew Wilcox <willy@linux.intel.com>2016-12-15 02:07:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-15 03:04:09 +0300
commitebb9a9aedb95f697673a96a26ff0322a13676381 (patch)
tree33cd935eb0dce081832d94bc05b5194af72244e0 /tools/include/asm
parent4b4bb46d00b386e1c972890dc5785a7966eaa9c0 (diff)
downloadlinux-ebb9a9aedb95f697673a96a26ff0322a13676381.tar.xz
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/asm')
-rw-r--r--tools/include/asm/bug.h11
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); \