From: Guenter Roeck <linux@roeck-us.net>
Date: Mon, 11 Aug 2014 03:50:30 +0000 (-0700)
Subject: seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~67^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=69f6a34bdeea4fec50bb90619bc9602973119572;p=pandora-kernel.git

seccomp: Replace BUG(!spin_is_locked()) with assert_spin_lock

Current upstream kernel hangs with mips and powerpc targets in
uniprocessor mode if SECCOMP is configured.

Bisect points to commit dbd952127d11 ("seccomp: introduce writer locking").
Turns out that code such as
	BUG_ON(!spin_is_locked(&list_lock));
can not be used in uniprocessor mode because spin_is_locked() always
returns false in this configuration, and that assert_spin_locked()
exists for that very purpose and must be used instead.

Fixes: dbd952127d11 ("seccomp: introduce writer locking")
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Kees Cook <keescook@chromium.org>
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