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authorAndi Kleen <ak@linux.intel.com>2017-11-18 02:27:06 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-18 03:10:01 +0300
commitaaf5dcfb223617ac2d16113e4b500199c65689de (patch)
tree708dbc2baef2f18cfb368b2e785642f6a4ece283 /include/linux/bug.h
parentb1fca27d384e8418aac84b39f6f5179aecc1b64f (diff)
downloadlinux-aaf5dcfb223617ac2d16113e4b500199c65689de.tar.xz
kernel debug: support resetting WARN_ONCE for all architectures
Some architectures store the WARN_ONCE state in the flags field of the bug_entry. Clear that one too when resetting once state through /sys/kernel/debug/clear_warn_once Pointed out by Michael Ellerman Improves the earlier patch that add clear_warn_once. [ak@linux.intel.com: add a missing ifdef CONFIG_MODULES] Link: http://lkml.kernel.org/r/20171020170633.9593-1-andi@firstfloor.org [akpm@linux-foundation.org: fix unused var warning] [akpm@linux-foundation.org: Use 0200 for clear_warn_once file, per mpe] [akpm@linux-foundation.org: clear BUGFLAG_DONE in clear_once_table(), per mpe] Link: http://lkml.kernel.org/r/20171019204642.7404-1-andi@firstfloor.org Signed-off-by: Andi Kleen <ak@linux.intel.com> Tested-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/bug.h')
-rw-r--r--include/linux/bug.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/bug.h b/include/linux/bug.h
index da4231c905c8..fe5916550da8 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -43,6 +43,8 @@ enum bug_trap_type report_bug(unsigned long bug_addr, struct pt_regs *regs);
/* These are defined by the architecture */
int is_valid_bugaddr(unsigned long addr);
+void generic_bug_clear_once(void);
+
#else /* !CONFIG_GENERIC_BUG */
static inline enum bug_trap_type report_bug(unsigned long bug_addr,
@@ -51,6 +53,9 @@ static inline enum bug_trap_type report_bug(unsigned long bug_addr,
return BUG_TRAP_TYPE_BUG;
}
+
+static inline void generic_bug_clear_once(void) {}
+
#endif /* CONFIG_GENERIC_BUG */
/*