diff options
author | Will Deacon <will.deacon@arm.com> | 2011-11-23 05:28:25 -0500 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-11-26 16:58:53 -0500 |
commit | c36ef4b1762302a493c6cb754073bded084700e2 (patch) | |
tree | 2ea1bf8bb2ee7d972c09e0b29cc178c4c930ab4a /arch/arm/lib/clearbit.S | |
parent | c89cefed35c8c5f53f36757f8a6768e390394ee3 (diff) |
ARM: 7171/1: unwind: add unwind directives to bitops assembly macros
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>
Diffstat (limited to 'arch/arm/lib/clearbit.S')
-rw-r--r-- | arch/arm/lib/clearbit.S | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/arm/lib/clearbit.S b/arch/arm/lib/clearbit.S index 4c04c3b51eeb..f6b75fb64d30 100644 --- a/arch/arm/lib/clearbit.S +++ b/arch/arm/lib/clearbit.S | |||
@@ -12,6 +12,4 @@ | |||
12 | #include "bitops.h" | 12 | #include "bitops.h" |
13 | .text | 13 | .text |
14 | 14 | ||
15 | ENTRY(_clear_bit) | 15 | bitop _clear_bit, bic |
16 | bitop bic | ||
17 | ENDPROC(_clear_bit) | ||