• Andrey Konovalov's avatar
    locking, arch: use WRITE_ONCE()/READ_ONCE() in smp_store_release()/smp_load_acquire() · 76695af2
    Andrey Konovalov authored
    Replace ACCESS_ONCE() macro in smp_store_release() and smp_load_acquire()
    with WRITE_ONCE() and READ_ONCE() on x86, arm, arm64, ia64, metag, mips,
    powerpc, s390, sparc and asm-generic since ACCESS_ONCE() does not work
    reliably on non-scalar types.
    
    WRITE_ONCE() and READ_ONCE() were introduced in the following commits:
    
      230fa253 ("kernel: Provide READ_ONCE and ASSIGN_ONCE")
      43239cbe ("kernel: Change ASSIGN_ONCE(val, x) to WRITE_ONCE(x, val)")
    Signed-off-by: default avatarAndrey Konovalov <andreyknvl@google.com>
    Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
    Acked-by: default avatarDavidlohr Bueso <dbueso@suse.de>
    Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
    Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
    Cc: Alexander Duyck <alexander.h.duyck@redhat.com>
    Cc: Andre Przywara <andre.przywara@arm.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Christian Borntraeger <borntraeger@de.ibm.com>
    Cc: David S. Miller <davem@davemloft.net>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Cc: Dmitry Vyukov <dvyukov@google.com>
    Cc: Fenghua Yu <fenghua.yu@intel.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
    Cc: James Hogan <james.hogan@imgtec.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Russell King <linux@arm.linux.org.uk>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tony Luck <tony.luck@intel.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: linux-arch@vger.kernel.org
    Link: http://lkml.kernel.org/r/1438528264-714-1-git-send-email-andreyknvl@google.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    76695af2
barrier.h 3.66 KB