1. 17 5月, 2008 1 次提交
  2. 02 5月, 2008 1 次提交
  3. 29 4月, 2008 2 次提交
  4. 28 4月, 2008 3 次提交
  5. 24 4月, 2008 2 次提交
  6. 21 4月, 2008 1 次提交
  7. 17 4月, 2008 1 次提交
  8. 03 4月, 2008 1 次提交
  9. 14 3月, 2008 1 次提交
  10. 10 3月, 2008 1 次提交
  11. 05 3月, 2008 4 次提交
  12. 15 2月, 2008 2 次提交
  13. 14 2月, 2008 1 次提交
    • P
      xtime_lock vs update_process_times · aa02cd2d
      Peter Zijlstra 提交于
      Commit d3d74453 ("hrtimer: fixup the
      HRTIMER_CB_IRQSAFE_NO_SOFTIRQ fallback") broke several archs, and since
      only Russell bothered to merge the fix, and Greg to ACK his arch, I'm
      sending this for merger.
      
      I have confirmation that the Alpha bit results in a booting kernel.
      That leaves: blackfin, frv, sh and sparc untested.
      
      The deadlock in question was found by Russell:
      
        IRQ handle
          -> timer_tick() - xtime seqlock held for write
            -> update_process_times()
              -> run_local_timers()
                -> hrtimer_run_queues()
                  -> hrtimer_get_softirq_time() - tries to get a read lock
      
      Now, Thomas assures me the fix is trivial, only do_timer() needs to be
      done under the xtime_lock, and update_process_times() can savely be
      removed from under it.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Acked-by: NGreg Ungerer <gerg@uclinux.org>
      CC: Richard Henderson <rth@twiddle.net>
      CC: Bryan Wu <bryan.wu@analog.com>
      CC: David Howells <dhowells@redhat.com>
      CC: Paul Mundt <lethal@linux-sh.org>
      CC: William Irwin <wli@holomorphy.com>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      Acked-by: NIvan Kokshaysky <ink@jurassic.park.msu.ru>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      aa02cd2d
  14. 09 2月, 2008 6 次提交
    • S
      ide: introduce HAVE_IDE · ec7748b5
      Sam Ravnborg 提交于
      To allow flexible configuration of IDE introduce HAVE_IDE.
      All archs except arm, um and s390 unconditionally select it.
      For arm the actual configuration determine if IDE is supported.
      
      This is a step towards introducing drivers/Kconfig for arm.
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      Acked-by: NRussell King - ARM Linux <linux@arm.linux.org.uk>
      Acked-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
      ec7748b5
    • 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
    • J
    • D
      aout: remove unnecessary inclusions of {asm, linux}/a.out.h · 1eb11411
      David Howells 提交于
      Remove now unnecessary inclusions of {asm,linux}/a.out.h.
      
      [akpm@linux-foundation.org: fix alpha build]
      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>
      1eb11411
    • D
      aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT · 7fa30315
      David Howells 提交于
      Suppress A.OUT library support if CONFIG_ARCH_SUPPORTS_AOUT is not set.
      
      Not all architectures support the A.OUT binfmt, so the ELF binfmt should not
      be permitted to go looking for A.OUT libraries to load in such a case.  Not
      only that, but under such conditions A.OUT core dumps are not produced either.
      
      To make this work, this patch also does the following:
      
       (1) Makes the existence of the contents of linux/a.out.h contingent on
           CONFIG_ARCH_SUPPORTS_AOUT.
      
       (2) Renames dump_thread() to aout_dump_thread() as it's only called by A.OUT
           core dumping code.
      
       (3) Moves aout_dump_thread() into asm/a.out-core.h and makes it inline.  This
           is then included only where needed.  This means that this bit of arch
           code will be stored in the appropriate A.OUT binfmt module rather than
           the core kernel.
      
       (4) Drops A.OUT support for Blackfin (according to Mike Frysinger it's not
           needed) and FRV.
      
      This patch depends on the previous patch to 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.
      
      [jdike@addtoit.com: uml: re-remove accidentally restored code]
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NJeff Dike <jdike@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7fa30315
    • D
      aout: mark arches that support A.OUT format · b0b933c0
      David Howells 提交于
      Mark arches that support A.OUT format by including the following in their
      master Kconfig files:
      
      	config ARCH_SUPPORTS_AOUT
      		def_bool y
      
      This should also be set if the arch provides compatibility A.OUT support for
      an older arch, for instance x86_64 for i386 or sparc64 for sparc.
      
      I've guessed at which arches don't, based on comments in the code, however I'm
      sure that some of the ones I've marked as 'yes' actually should be 'no'.
      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>
      b0b933c0
  15. 08 2月, 2008 1 次提交
    • B
      Introduce flags for reserve_bootmem() · 72a7fe39
      Bernhard Walle 提交于
      This patchset adds a flags variable to reserve_bootmem() and uses the
      BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
      between crashkernel area and already used memory.
      
      This patch:
      
      Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
      If that flag is set, the function returns with -EBUSY if the memory already
      has been reserved in the past.  This is to avoid conflicts.
      
      Because that code runs before SMP initialisation, there's no race condition
      inside reserve_bootmem_core().
      
      [akpm@linux-foundation.org: coding-style fixes]
      [akpm@linux-foundation.org: fix powerpc build]
      Signed-off-by: NBernhard Walle <bwalle@suse.de>
      Cc: <linux-arch@vger.kernel.org>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Vivek Goyal <vgoyal@in.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      72a7fe39
  16. 07 2月, 2008 3 次提交
    • A
      calibrate_delay() must be __cpuinit · 6c81c32f
      Adrian Bunk 提交于
      calibrate_delay() must be __cpuinit, not __{dev,}init.
      
      I've verified that this is correct for all users.
      
      While doing the latter, I also did the following cleanups:
      - remove pointless additional prototypes in C files
      - ensure all users #include <linux/delay.h>
      
      This fixes the following section mismatches with CONFIG_HOTPLUG=n,
      CONFIG_HOTPLUG_CPU=y:
      
      WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder')
      WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map')
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Christian Zankel <chris@zankel.net>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6c81c32f
    • E
      get rid of NR_OPEN and introduce a sysctl_nr_open · 9cfe015a
      Eric Dumazet 提交于
      NR_OPEN (historically set to 1024*1024) actually forbids processes to open
      more than 1024*1024 handles.
      
      Unfortunatly some production servers hit the not so 'ridiculously high
      value' of 1024*1024 file descriptors per process.
      
      Changing NR_OPEN is not considered safe because of vmalloc space potential
      exhaust.
      
      This patch introduces a new sysctl (/proc/sys/fs/nr_open) wich defaults to
      1024*1024, so that admins can decide to change this limit if their workload
      needs it.
      
      [akpm@linux-foundation.org: export it for sparc64]
      Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      9cfe015a
    • J
      alpha/parisc: remove config variable DEBUG_RWLOCK · 20420bba
      Jiri Olsa 提交于
      Remove config variable DEBUG_RWLOCK, since it is not used.
      Signed-off-by: NJiri Olsa <olsajiri@gmail.com>
      Acked-by: NGrant Grundler <grundler@parisc-linux.org>
      Acked-by: NKyle McMartin <kyle@mcmartin.ca>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      20420bba
  17. 06 2月, 2008 4 次提交
  18. 03 2月, 2008 3 次提交
    • A
      remove Documentation/smp.txt · 03502faa
      Adrian Bunk 提交于
      After seeing the filename I'd have expected something about the
      implementation of SMP in the Linux kernel - not some notes on kernel
      configuration and building trivialities noone would search at this
      place.
      Signed-off-by: NAdrian Bunk <bunk@kernel.org>
      Acked-by: NAlan Cox <alan@redhat.com>
      03502faa
    • M
      Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig · 125e5645
      Mathieu Desnoyers 提交于
      Move the instrumentation Kconfig to
      
      arch/Kconfig for architecture dependent options
        - oprofile
        - kprobes
      
      and
      
      init/Kconfig for architecture independent options
        - profiling
        - markers
      
      Remove the "Instrumentation Support" menu. Everything moves to "General setup".
      Delete the kernel/Kconfig.instrumentation file.
      Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: <linux-arch@vger.kernel.org>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      125e5645
    • M
      Add HAVE_OPROFILE · 42d4b839
      Mathieu Desnoyers 提交于
      Linus:
      On the per-architecture side, I do think it would be better to *not* have
      internal architecture knowledge in a generic file, and as such a line like
      
              depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
      
      really shouldn't exist in a file like kernel/Kconfig.instrumentation.
      
      It would be much better to do
      
              depends on ARCH_SUPPORTS_KPROBES
      
      in that generic file, and then architectures that do support it would just
      have a
      
              bool ARCH_SUPPORTS_KPROBES
                      default y
      
      in *their* architecture files. That would seem to be much more logical,
      and is readable both for arch maintainers *and* for people who have no
      clue - and don't care - about which architecture is supposed to support
      which interface...
      
      Changelog:
      
      Actually, I know I gave this as the magic incantation, but now that I see
      it, I realize that I should have told you to just use
      
              config ARCH_SUPPORTS_KPROBES
                      def_bool y
      
      instead, which is a bit denser.
      
      We seem to use both kinds of syntax for these things, but this is really
      what "def_bool" is there for...
      
      Changelog :
      
      - Moving to HAVE_*.
      - Add AVR32 oprofile.
      Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      42d4b839
  19. 02 2月, 2008 1 次提交
  20. 29 1月, 2008 1 次提交