1. 03 4月, 2008 1 次提交
    • C
      kvm: provide kvm.h for all architecture: fixes headers_install · dd135ebb
      Christian Borntraeger 提交于
      Currently include/linux/kvm.h is not considered by make headers_install,
      because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h.  This problem
      was introduced by
      
      commit fb56dbb3
      Author: Avi Kivity <avi@qumranet.com>
      Date:   Sun Dec 2 10:50:06 2007 +0200
      
          KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM
      
          Currently, make headers_check barfs due to <asm/kvm.h>, which <linux/kvm.h>
          includes, not existing.  Rather than add a zillion <asm/kvm.h>s, export kvm.
          only if the arch actually supports it.
      Signed-off-by: NAvi Kivity <avi@qumranet.com>
      
      which makes this an 2.6.25 regression.
      
      One way of solving the issue is to enhance Kbuild, but Avi and David conviced
      me, that changing headers_install is not the way to go.  This patch changes
      the definition for linux/kvm.h to unifdef-y.
      
      If  unifdef-y is used for linux/kvm.h "make headers_check" will fail on all
      architectures without asm/kvm.h.  Therefore, this patch also provides
      asm/kvm.h on all architectures.
      Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
      Acked-by: NAvi Kivity <avi@qumranet.com>
      Cc: Sam Ravnborg <sam@ravnborg.org
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      dd135ebb
  2. 14 3月, 2008 1 次提交
  3. 24 2月, 2008 2 次提交
  4. 10 2月, 2008 1 次提交
  5. 09 2月, 2008 3 次提交
    • H
      avoid overflows in kernel/time.c · bdc80787
      H. Peter Anvin 提交于
      When the conversion factor between jiffies and milli- or microseconds is
      not a single multiply or divide, as for the case of HZ == 300, we currently
      do a multiply followed by a divide.  The intervening result, however, is
      subject to overflows, especially since the fraction is not simplified (for
      HZ == 300, we multiply by 300 and divide by 1000).
      
      This is exposed to the user when passing a large timeout to poll(), for
      example.
      
      This patch replaces the multiply-divide with a reciprocal multiplication on
      32-bit platforms.  When the input is an unsigned long, there is no portable
      way to do this on 64-bit platforms there is no portable way to do this
      since it requires a 128-bit intermediate result (which gcc does support on
      64-bit platforms but may generate libgcc calls, e.g.  on 64-bit s390), but
      since the output is a 32-bit integer in the cases affected, just simplify
      the multiply-divide (*3/10 instead of *300/1000).
      
      The reciprocal multiply used can have off-by-one errors in the upper half
      of the valid output range.  This could be avoided at the expense of having
      to deal with a potential 65-bit intermediate result.  Since the intent is
      to avoid overflow problems and most of the other time conversions are only
      semiexact, the off-by-one errors were considered an acceptable tradeoff.
      
      At Ralf Baechle's suggestion, this version uses a Perl script to compute
      the necessary constants.  We already have dependencies on Perl for kernel
      compiles.  This does, however, require the Perl module Math::BigInt, which
      is included in the standard Perl distribution starting with version 5.8.0.
      In order to support older versions of Perl, include a table of canned
      constants in the script itself, and structure the script so that
      Math::BigInt isn't required if pulling values from said table.
      
      Running the script requires that the HZ value is available from the
      Makefile.  Thus, this patch also adds the Kconfig variable CONFIG_HZ to the
      architectures which didn't already have it (alpha, cris, frv, h8300, m32r,
      m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or
      sh64 architectures, since Paul Mundt has dealt with those separately in the
      sh tree.
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>,
      Cc: Sam Ravnborg <sam@ravnborg.org>,
      Cc: Paul Mundt <lethal@linux-sh.org>,
      Cc: Richard Henderson <rth@twiddle.net>,
      Cc: Michael Starvik <starvik@axis.com>,
      Cc: David Howells <dhowells@redhat.com>,
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>,
      Cc: Hirokazu Takata <takata@linux-m32r.org>,
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
      Cc: Roman Zippel <zippel@linux-m68k.org>,
      Cc: William L. Irwin <sparclinux@vger.kernel.org>,
      Cc: Chris Zankel <chris@zankel.net>,
      Cc: H. Peter Anvin <hpa@zytor.com>,
      Cc: Jan Engelhardt <jengelh@computergmbh.de>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      bdc80787
    • M
      asm-*/posix_types.h: scrub __GLIBC__ · 531d7d42
      Mike Frysinger 提交于
      Some arches (like alpha and ia64) already have a clean posix_types.h header.
      This brings all the others in line by removing all references to __GLIBC__
      (and some undocumented __USE_ALL).
      Signed-off-by: NMike Frysinger <vapier@gentoo.org>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      Cc: Ulrich Drepper <drepper@redhat.com>
      Cc: Roland McGrath <roland@redhat.com>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      531d7d42
    • D
      aout: move STACK_TOP[_MAX] to asm/processor.h · 922a70d3
      David Howells 提交于
      Move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're
      required whether or not A.OUT format is available.
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      922a70d3
  6. 08 2月, 2008 3 次提交
  7. 07 2月, 2008 1 次提交
  8. 01 2月, 2008 1 次提交
  9. 11 12月, 2007 1 次提交
  10. 23 10月, 2007 2 次提交
    • J
      Add CONFIG_DEBUG_SG sg validation · d6ec0842
      Jens Axboe 提交于
      Add a Kconfig entry which will toggle some sanity checks on the sg
      entry and tables.
      Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      d6ec0842
    • J
      Change table chaining layout · 18dabf47
      Jens Axboe 提交于
      Change the page member of the scatterlist structure to be an unsigned
      long, and encode more stuff in the lower bits:
      
      - Bits 0 and 1 zero: this is a normal sg entry. Next sg entry is located
        at sg + 1.
      - Bit 0 set: this is a chain entry, the next real entry is at ->page_link
        with the two low bits masked off.
      - Bit 1 set: this is the final entry in the sg entry. sg_next() will return
        NULL when passed such an entry.
      
      It's thus important that sg table users use the proper accessors to get
      and set the page member.
      Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      18dabf47
  11. 20 10月, 2007 3 次提交
  12. 19 10月, 2007 1 次提交
    • N
      bitops: introduce lock ops · 26333576
      Nick Piggin 提交于
      Introduce test_and_set_bit_lock / clear_bit_unlock bitops with lock semantics.
      Convert all architectures to use the generic implementation.
      Signed-off-by: NNick Piggin <npiggin@suse.de>
      Acked-By: NDavid Howells <dhowells@redhat.com>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: Bryan Wu <bryan.wu@analog.com>
      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: Hirokazu Takata <takata@linux-m32r.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Greg Ungerer <gerg@uclinux.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Matthew Wilcox <willy@debian.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
      Cc: Richard Curnow <rc@rc0.org.uk>
      Cc: William Lee Irwin III <wli@holomorphy.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
      Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
      Cc: Andi Kleen <ak@muc.de>
      Cc: Chris Zankel <chris@zankel.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      26333576
  13. 17 10月, 2007 4 次提交
  14. 03 10月, 2007 1 次提交
  15. 01 8月, 2007 1 次提交
  16. 23 7月, 2007 1 次提交
  17. 20 7月, 2007 1 次提交
  18. 18 7月, 2007 3 次提交
  19. 17 7月, 2007 3 次提交
  20. 12 7月, 2007 1 次提交
  21. 11 7月, 2007 1 次提交
    • A
      lots-of-architectures: enable arbitary speed tty support · 4eb6bf6b
      Alan Cox 提交于
      Add the termios2 structure ready for enabling on most platforms.  One or
      two like Sparc are plain weird so have been left alone.  Most can use the
      same structure as ktermios for termios2 (ie the newer ioctl uses the
      structure matching the current kernel structure)
      Signed-off-by: NAlan Cox <alan@redhat.com>
      Cc: Bryan Wu <bryan.wu@analog.com>
      Cc: Ian Molton <spyro@f2s.com>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Matthew Wilcox <willy@debian.org>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
      Cc: Richard Curnow <rc@rc0.org.uk>
      Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
      Cc: Chris Zankel <chris@zankel.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      4eb6bf6b
  22. 01 6月, 2007 1 次提交
  23. 15 5月, 2007 1 次提交
  24. 11 5月, 2007 2 次提交