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ARM: 7171/1: unwind: add unwind directives to bitops assembly macros

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The bitops functions (e.g. _test_and_set_bit) on ARM do not have unwind
annotations and therefore the kernel cannot backtrace out of them on a
fatal error (for example, NULL pointer dereference).

This patch annotates the bitops assembly macros with UNWIND annotations
so that we can produce a meaningful backtrace on error. Callers of the
macros are modified to pass their function name as a macro parameter,
enforcing that the macros are used as standalone function implementations.

Acked-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Will Deacon
2011-11-23 11:28:25 +01:00
committed by Russell King
parent c89cefed35
commit c36ef4b176
7 changed files with 28 additions and 22 deletions
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4
arch/arm/lib/setbit.S
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@@ -12,6 +12,4 @@
#include "bitops.h"
.text
ENTRY(_set_bit)
bitop orr
ENDPROC(_set_bit)
bitop _set_bit, orr