• Josh Poimboeuf's avatar
    x86/locking: Create stack frame in PV unlock · 16df4ff8
    Josh Poimboeuf authored
    The assembly PV_UNLOCK function is a callable non-leaf function which
    doesn't honor CONFIG_FRAME_POINTER, which can result in bad stack
    traces.
    
    Create a stack frame when CONFIG_FRAME_POINTER is enabled.
    Signed-off-by: default avatarJosh Poimboeuf <jpoimboe@redhat.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
    Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Chris J Arges <chris.j.arges@canonical.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Jiri Slaby <jslaby@suse.cz>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Michal Marek <mmarek@suse.cz>
    Cc: Namhyung Kim <namhyung@gmail.com>
    Cc: Pedro Alves <palves@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Waiman Long <Waiman.Long@hpe.com>
    Cc: live-patching@vger.kernel.org
    Link: http://lkml.kernel.org/r/6685a72ddbbd0ad3694337cca0af4b4ea09f5f40.1453405861.git.jpoimboe@redhat.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    16df4ff8
qspinlock_paravirt.h 1.85 KB