• Heiko Carstens's avatar
    locking: Allow arch-inlined spinlocks · 892a7c67
    Heiko Carstens authored
    This allows an architecture to specify per lock variant if the
    locking code should be kept out-of-line or inlined.
    
    If an architecure wants out-of-line locking code no change is
    needed. To force inlining of e.g. spin_lock() the line:
    
      #define __always_inline__spin_lock
    
    needs to be added to arch/<...>/include/asm/spinlock.h
    
    If CONFIG_DEBUG_SPINLOCK or CONFIG_GENERIC_LOCKBREAK are
    defined the per architecture defines are (partly) ignored and
    still out-of-line spinlock code will be generated.
    Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
    Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Nick Piggin <nickpiggin@yahoo.com.au>
    Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
    Cc: Horst Hartmann <horsth@linux.vnet.ibm.com>
    Cc: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: David Miller <davem@davemloft.net>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Geert Uytterhoeven <geert@linux-m68k.org>
    Cc: Roman Zippel <zippel@linux-m68k.org>
    Cc: <linux-arch@vger.kernel.org>
    LKML-Reference: <20090831124418.375299024@de.ibm.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    892a7c67
spinlock.c 8.6 KB