1. 24 3月, 2011 4 次提交
    • A
      bitops: remove minix bitops from asm/bitops.h · 61f2e7b0
      Akinobu Mita 提交于
      minix bit operations are only used by minix filesystem and useless by
      other modules.  Because byte order of inode and block bitmaps is different
      on each architecture like below:
      
      m68k:
      	big-endian 16bit indexed bitmaps
      
      h8300, microblaze, s390, sparc, m68knommu:
      	big-endian 32 or 64bit indexed bitmaps
      
      m32r, mips, sh, xtensa:
      	big-endian 32 or 64bit indexed bitmaps for big-endian mode
      	little-endian bitmaps for little-endian mode
      
      Others:
      	little-endian bitmaps
      
      In order to move minix bit operations from asm/bitops.h to architecture
      independent code in minix filesystem, this provides two config options.
      
      CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED is only selected by m68k.
      CONFIG_MINIX_FS_NATIVE_ENDIAN is selected by the architectures which use
      native byte order bitmaps (h8300, microblaze, s390, sparc, m68knommu,
      m32r, mips, sh, xtensa).  The architectures which always use little-endian
      bitmaps do not select these options.
      
      Finally, we can remove minix bit operations from asm/bitops.h for all
      architectures.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Acked-by: NArnd Bergmann <arnd@arndb.de>
      Acked-by: NGreg Ungerer <gerg@uclinux.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Andreas Schwab <schwab@linux-m68k.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Michal Simek <monstr@monstr.eu>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Acked-by: NRalf Baechle <ralf@linux-mips.org>
      Acked-by: NPaul Mundt <lethal@linux-sh.org>
      Cc: Chris Zankel <chris@zankel.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      61f2e7b0
    • A
      bitops: remove ext2 non-atomic bitops from asm/bitops.h · f312eff8
      Akinobu Mita 提交于
      As the result of conversions, there are no users of ext2 non-atomic bit
      operations except for ext2 filesystem itself.  Now we can put them into
      architecture independent code in ext2 filesystem, and remove from
      asm/bitops.h for all architectures.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Cc: Jan Kara <jack@suse.cz>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f312eff8
    • A
      bitops: introduce little-endian bitops for most architectures · 861b5ae7
      Akinobu Mita 提交于
      Introduce little-endian bit operations to the big-endian architectures
      which do not have native little-endian bit operations and the
      little-endian architectures.  (alpha, avr32, blackfin, cris, frv, h8300,
      ia64, m32r, mips, mn10300, parisc, sh, sparc, tile, x86, xtensa)
      
      These architectures can just include generic implementation
      (asm-generic/bitops/le.h).
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Matthew Wilcox <willy@debian.org>
      Cc: Grant Grundler <grundler@parisc-linux.org>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Acked-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
      Acked-by: N"H. Peter Anvin" <hpa@zytor.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      861b5ae7
    • R
      MN10300: gcc 4.6 vs am33 inline assembly · 5a4b65ab
      Richard Henderson 提交于
      GCC 4.6 explicitly represents the MDR register.  It may be accessed
      via the "z" constraint.  Perhaps more importantly, it tracks when
      the MDR register is clobbered and uses the RETF instruction if the
      incoming value is still valid.
      
      Thus it is important to (at least) clobber the MDR register in
      relevant inline assembly fragments, lest RETF be used incorrectly.
      
      The only instances I could find are here.  There are reads of the
      MDR register in kernel/gdb-stub.c, but that's harmless.  Although,
      frankly, __builtin_return_address(0) might be a better thing in
      those cases.  Certainly MDR isn't going to contain anything else
      that might be useful...
      Signed-off-by: NRichard Henderson  <rth@redhat.com>
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      5a4b65ab
  2. 23 3月, 2011 2 次提交
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