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Commit b530a307 authored by Syed Rameez Mustafa's avatar Syed Rameez Mustafa Committed by Isaac J. Manjarres
Browse files

kernel/lib: add additional debug capabilities for data corruption 



Data corruptions in the kernel often end up in system crashes that
are easier to debug closer to the time of detection. Specifically,
if we do not panic immediately after lock or list corruptions have been
detected, the problem context is lost in the ensuing system mayhem.
Add support for BUG_ON immediately after such corruptions are detected.
The CONFIG option controls the enabling/disabling of the feature.

Change-Id: I9b2eb62da506a13007acff63e85e9515145909ff
Signed-off-by: default avatarSyed Rameez Mustafa <rameezmustafa@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
Signed-off-by: default avatarIsaac J. Manjarres <isaacm@codeaurora.org>
parent 12165278

include/linux/bug.h

+5 −0
Original line number Diff line number Diff line
@@ -71,4 +71,9 @@ static inline __must_check bool check_data_corruption(bool v) { return v; } 
		corruption;						 \

	}))



#ifdef CONFIG_PANIC_ON_DATA_CORRUPTION

#define PANIC_CORRUPTION 1

#else

#define PANIC_CORRUPTION 0

#endif  /* CONFIG_PANIC_ON_DATA_CORRUPTION */

#endif	/* _LINUX_BUG_H */

lib/Kconfig.debug

+7 −0
Original line number Diff line number Diff line
@@ -2061,6 +2061,13 @@ config BUG_ON_DATA_CORRUPTION 


	  If unsure, say N.



config PANIC_ON_DATA_CORRUPTION

	bool "Cause a Kernel Panic When Data Corruption is detected"

	help

	 Select this option to upgrade warnings for potentially

	 recoverable data corruption scenarios to system-halting panics,

	 for easier detection and debug.



source "samples/Kconfig"



source "lib/Kconfig.kgdb"