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| author | Ramon Fried <ramon.fried@gmail.com> | 2018-06-06 00:38:59 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-06-07 17:08:06 -0400 |
| commit | 948f32c8563568a76153f61ee4094c5aafe21eaf (patch) | |
| tree | 2f3102dd6f8799333ac7877da30165985ad07476 /include/linux | |
| parent | 46960ad6d09b948b5df5236029bc072f9800aeb3 (diff) | |
| download | u-boot-948f32c8563568a76153f61ee4094c5aafe21eaf.tar.gz | |
bug.h: introduce WARN_ONCE
Add WARN_ONCE definition to allow single time notification
of warnings to the user.
Taken from Linux kernel (4.17) with slight changes
(Removed __section(.data.once))
Signed-off-by: Ramon Fried <ramon.fried@gmail.com>
[trini: Drop the musb and dwc3 compat versions]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/bug.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/bug.h b/include/linux/bug.h index f07bb716fc..29f84168a3 100644 --- a/include/linux/bug.h +++ b/include/linux/bug.h @@ -20,6 +20,13 @@ unlikely(__ret_warn_on); \ }) +#define WARN(condition, format...) ({ \ + int __ret_warn_on = !!(condition); \ + if (unlikely(__ret_warn_on)) \ + printf(format); \ + unlikely(__ret_warn_on); \ +}) + #define WARN_ON_ONCE(condition) ({ \ static bool __warned; \ int __ret_warn_once = !!(condition); \ @@ -31,4 +38,15 @@ unlikely(__ret_warn_once); \ }) +#define WARN_ONCE(condition, format...) ({ \ + static bool __warned; \ + int __ret_warn_once = !!(condition); \ + \ + if (unlikely(__ret_warn_once && !__warned)) { \ + __warned = true; \ + WARN(1, format); \ + } \ + unlikely(__ret_warn_once); \ +}) + #endif /* _LINUX_BUG_H */ |