From: Will Deacon <will.deacon@arm.com>
Date: Wed, 23 Nov 2011 10:28:25 +0000 (+0100)
Subject: ARM: 7171/1: unwind: add unwind directives to bitops assembly macros
X-Git-Tag: v3.2-rc4~2^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c36ef4b1762302a493c6cb754073bded084700e2;p=pandora-kernel.git

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>
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