1. 30 Dec, 2011 11 commits
    • Linus Torvalds's avatar
      Revert "clockevents: Set noop handler in clockevents_exchange_device()" · 3b87487a
      Linus Torvalds authored
      This reverts commit de28f25e.
      
      It results in resume problems for various people. See for example
      
        http://thread.gmane.org/gmane.linux.kernel/1233033
        http://thread.gmane.org/gmane.linux.kernel/1233389
        http://thread.gmane.org/gmane.linux.kernel/1233159
        http://thread.gmane.org/gmane.linux.kernel/1227868/focus=1230877
      
      and the fedora and ubuntu bug reports
      
        https://bugzilla.redhat.com/show_bug.cgi?id=767248
        https://bugs.launchpad.net/ubuntu/+source/linux/+bug/904569
      
      which got bisected down to the stable version of this commit.
      Reported-by: default avatarJonathan Nieder <jrnieder@gmail.com>
      Reported-by: default avatarPhil Miller <mille121@illinois.edu>
      Reported-by: default avatarPhilip Langdale <philipl@overt.org>
      Reported-by: default avatarTim Gardner <tim.gardner@canonical.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Greg KH <gregkh@suse.de>
      Cc: stable@kernel.org    # for stable kernels that applied the original
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      3b87487a
    • Linus Torvalds's avatar
      Merge git://www.linux-watchdog.org/linux-watchdog · 995b4103
      Linus Torvalds authored
      * git://www.linux-watchdog.org/linux-watchdog:
        watchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing (part 2)
        watchdog: hpwdt: Changes to handle NX secure bit in 32bit path
        watchdog: sp805: Fix section mismatch in ID table.
        watchdog: move coh901327 state holders
      995b4103
    • Linus Torvalds's avatar
      Merge branch 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 89307bab
      Linus Torvalds authored
      * 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
        iommu: Initialize domain->handler in iommu_domain_alloc()
      89307bab
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 50b2abed
      Linus Torvalds authored
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        packet: fix possible dev refcnt leak when bind fail
        netem: dont call vfree() under spinlock and BH disabled
        netfilter: ctnetlink: fix scheduling while atomic if helper is autoloaded
        netfilter: ctnetlink: fix return value of ctnetlink_get_expect()
      50b2abed
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 7578ed02
      Linus Torvalds authored
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86: Fix raw_spin_unlock_irqrestore() usage
        oprofile, arm/sh: Fix oprofile_arch_exit() linkage issue
      7578ed02
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs · d2bac6ab
      Linus Torvalds authored
      * 'for-linus' of git://oss.sgi.com/xfs/xfs:
        xfs: log all dirty inodes in xfs_fs_sync_fs
        xfs: log the inode in ->write_inode calls for kupdate
      d2bac6ab
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 1cac8e88
      Linus Torvalds authored
      * 'for-linus' of git://git.kernel.dk/linux-block:
        block: fix blk_queue_end_tag()
        block: re-use existing 'reading' variable instead of checking direction again
        block, cfq: fix empty queue crash caused by request merge
      1cac8e88
    • Hillf Danton's avatar
      mm: hugetlb: fix non-atomic enqueue of huge page · b0365c8d
      Hillf Danton authored
      If a huge page is enqueued under the protection of hugetlb_lock, then the
      operation is atomic and safe.
      Signed-off-by: default avatarHillf Danton <dhillf@gmail.com>
      Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
      Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: <stable@vger.kernel.org>		[2.6.37+]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b0365c8d
    • Andreas Schwab's avatar
      procfs: do not confuse jiffies with cputime64_t · 34845636
      Andreas Schwab authored
      Commit 2a95ea6c ("procfs: do not overflow get_{idle,iowait}_time
      for nohz") did not take into account that one some architectures jiffies
      and cputime use different units.
      
      This causes get_idle_time() to return numbers in the wrong units, making
      the idle time fields in /proc/stat wrong.
      
      Instead of converting the usec value returned by
      get_cpu_{idle,iowait}_time_us to units of jiffies, use the new function
      usecs_to_cputime64 to convert it to the correct unit of cputime64_t.
      Signed-off-by: default avatarAndreas Schwab <schwab@linux-m68k.org>
      Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: "Artem S. Tashkinov" <t.artem@mailcity.com>
      Cc: Dave Jones <davej@redhat.com>
      Cc: Alexey Dobriyan <adobriyan@gmail.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      34845636
    • KOSAKI Motohiro's avatar
      mm/mempolicy.c: refix mbind_range() vma issue · e26a5114
      KOSAKI Motohiro authored
      commit 8aacc9f5 ("mm/mempolicy.c: fix pgoff in mbind vma merge") is the
      slightly incorrect fix.
      
      Why? Think following case.
      
      1. map 4 pages of a file at offset 0
      
         [0123]
      
      2. map 2 pages just after the first mapping of the same file but with
         page offset 2
      
         [0123][23]
      
      3. mbind() 2 pages from the first mapping at offset 2.
         mbind_range() should treat new vma is,
      
         [0123][23]
           |23|
           mbind vma
      
         but it does
      
         [0123][23]
           |01|
           mbind vma
      
         Oops. then, it makes wrong vma merge and splitting ([01][0123] or similar).
      
      This patch fixes it.
      
      [testcase]
        test result - before the patch
      
      	case4: 126: test failed. expect '2,4', actual '2,2,2'
             	case5: passed
      	case6: passed
      	case7: passed
      	case8: passed
      	case_n: 246: test failed. expect '4,2', actual '1,4'
      
      	------------[ cut here ]------------
      	kernel BUG at mm/filemap.c:135!
      	invalid opcode: 0000 [#4] SMP DEBUG_PAGEALLOC
      
      	(snip long bug on messages)
      
        test result - after the patch
      
      	case4: passed
             	case5: passed
      	case6: passed
      	case7: passed
      	case8: passed
      	case_n: passed
      
        source:  mbind_vma_test.c
      ============================================================
       #include <numaif.h>
       #include <numa.h>
       #include <sys/mman.h>
       #include <stdio.h>
       #include <unistd.h>
       #include <stdlib.h>
       #include <string.h>
      
      static unsigned long pagesize;
      void* mmap_addr;
      struct bitmask *nmask;
      char buf[1024];
      FILE *file;
      char retbuf[10240] = "";
      int mapped_fd;
      
      char *rubysrc = "ruby -e '\
        pid = %d; \
        vstart = 0x%llx; \
        vend = 0x%llx; \
        s = `pmap -q #{pid}`; \
        rary = []; \
        s.each_line {|line|; \
          ary=line.split(\" \"); \
          addr = ary[0].to_i(16); \
          if(vstart <= addr && addr < vend) then \
            rary.push(ary[1].to_i()/4); \
          end; \
        }; \
        print rary.join(\",\"); \
      '";
      
      void init(void)
      {
      	void* addr;
      	char buf[128];
      
      	nmask = numa_allocate_nodemask();
      	numa_bitmask_setbit(nmask, 0);
      
      	pagesize = getpagesize();
      
      	sprintf(buf, "%s", "mbind_vma_XXXXXX");
      	mapped_fd = mkstemp(buf);
      	if (mapped_fd == -1)
      		perror("mkstemp "), exit(1);
      	unlink(buf);
      
      	if (lseek(mapped_fd, pagesize*8, SEEK_SET) < 0)
      		perror("lseek "), exit(1);
      	if (write(mapped_fd, "\0", 1) < 0)
      		perror("write "), exit(1);
      
      	addr = mmap(NULL, pagesize*8, PROT_NONE,
      		    MAP_SHARED, mapped_fd, 0);
      	if (addr == MAP_FAILED)
      		perror("mmap "), exit(1);
      
      	if (mprotect(addr+pagesize, pagesize*6, PROT_READ|PROT_WRITE) < 0)
      		perror("mprotect "), exit(1);
      
      	mmap_addr = addr + pagesize;
      
      	/* make page populate */
      	memset(mmap_addr, 0, pagesize*6);
      }
      
      void fin(void)
      {
      	void* addr = mmap_addr - pagesize;
      	munmap(addr, pagesize*8);
      
      	memset(buf, 0, sizeof(buf));
      	memset(retbuf, 0, sizeof(retbuf));
      }
      
      void mem_bind(int index, int len)
      {
      	int err;
      
      	err = mbind(mmap_addr+pagesize*index, pagesize*len,
      		    MPOL_BIND, nmask->maskp, nmask->size, 0);
      	if (err)
      		perror("mbind "), exit(err);
      }
      
      void mem_interleave(int index, int len)
      {
      	int err;
      
      	err = mbind(mmap_addr+pagesize*index, pagesize*len,
      		    MPOL_INTERLEAVE, nmask->maskp, nmask->size, 0);
      	if (err)
      		perror("mbind "), exit(err);
      }
      
      void mem_unbind(int index, int len)
      {
      	int err;
      
      	err = mbind(mmap_addr+pagesize*index, pagesize*len,
      		    MPOL_DEFAULT, NULL, 0, 0);
      	if (err)
      		perror("mbind "), exit(err);
      }
      
      void Assert(char *expected, char *value, char *name, int line)
      {
      	if (strcmp(expected, value) == 0) {
      		fprintf(stderr, "%s: passed\n", name);
      		return;
      	}
      	else {
      		fprintf(stderr, "%s: %d: test failed. expect '%s', actual '%s'\n",
      			name, line,
      			expected, value);
      //		exit(1);
      	}
      }
      
      /*
            AAAA
          PPPPPPNNNNNN
          might become
          PPNNNNNNNNNN
          case 4 below
      */
      void case4(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	mem_bind(0, 4);
      	mem_unbind(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("2,4", retbuf, "case4", __LINE__);
      
      	fin();
      }
      
      /*
             AAAA
       PPPPPPNNNNNN
       might become
       PPPPPPPPPPNN
       case 5 below
      */
      void case5(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	mem_bind(0, 2);
      	mem_bind(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("4,2", retbuf, "case5", __LINE__);
      
      	fin();
      }
      
      /*
      	    AAAA
      	PPPPNNNNXXXX
      	might become
      	PPPPPPPPPPPP 6
      */
      void case6(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	mem_bind(0, 2);
      	mem_bind(4, 2);
      	mem_bind(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("6", retbuf, "case6", __LINE__);
      
      	fin();
      }
      
      /*
          AAAA
      PPPPNNNNXXXX
      might become
      PPPPPPPPXXXX 7
      */
      void case7(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	mem_bind(0, 2);
      	mem_interleave(4, 2);
      	mem_bind(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("4,2", retbuf, "case7", __LINE__);
      
      	fin();
      }
      
      /*
          AAAA
      PPPPNNNNXXXX
      might become
      PPPPNNNNNNNN 8
      */
      void case8(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	mem_bind(0, 2);
      	mem_interleave(4, 2);
      	mem_interleave(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("2,4", retbuf, "case8", __LINE__);
      
      	fin();
      }
      
      void case_n(void)
      {
      	init();
      	sprintf(buf, rubysrc, getpid(), mmap_addr, mmap_addr+pagesize*6);
      
      	/* make redundunt mappings [0][1234][34][7] */
      	mmap(mmap_addr + pagesize*4, pagesize*2, PROT_READ|PROT_WRITE,
      	     MAP_FIXED|MAP_SHARED, mapped_fd, pagesize*3);
      
      	/* Expect to do nothing. */
      	mem_unbind(2, 2);
      
      	file = popen(buf, "r");
      	fread(retbuf, sizeof(retbuf), 1, file);
      	Assert("4,2", retbuf, "case_n", __LINE__);
      
      	fin();
      }
      
      int main(int argc, char** argv)
      {
      	case4();
      	case5();
      	case6();
      	case7();
      	case8();
      	case_n();
      
      	return 0;
      }
      =============================================================
      Signed-off-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
      Cc: Minchan Kim <minchan.kim@gmail.com>
      Cc: Caspar Zhang <caspar@casparzhang.com>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Christoph Lameter <cl@linux.com>
      Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
      Cc: <stable@vger.kernel.org>		[3.1.x]
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      e26a5114
    • Hans de Goede's avatar
      gspca: Fix bulk mode cameras no longer working (regression fix) · 757e55c2
      Hans de Goede authored
      The new iso bandwidth calculation code accidentally has broken support
      for bulk mode cameras. This has broken the following drivers:
      finepix, jeilinj, ovfx2, ov534, ov534_9, se401, sq905, sq905c, sq930x,
      stv0680, vicam.
      
      Thix patch fixes this. Fix tested with: se401, sq905, sq905c, stv0680 & vicam
      cams.
      Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      757e55c2
  2. 29 Dec, 2011 1 commit
  3. 28 Dec, 2011 1 commit
  4. 27 Dec, 2011 3 commits
    • Wim Van Sebroeck's avatar
      watchdog: iTCO_wdt.c - problems with newer hardware due to SMI clearing (part 2) · 0d098587
      Wim Van Sebroeck authored
      Redhat Bugzilla: Bug 727875 - TCO_EN bit is disabled by TCO driver
      
      The previous patch breaks reset watchdog behaviour on the older hardware.
      It is therefor better to make sure that the behaviour for older hardware (<=ICH5 or
      6300ESB) is preserved and that the behaviour for newer hardware is changed.
      We therefor use the iTCO_version to see if we need the clearing of the SMI_TCO_EN
      bit in the SMI_EN register.
      
      So the new behaviour becomes:
      turn_SMI_watchdog_clear_off=0 -> Do not turn off SMI clearing watchdog.
      turn_SMI_watchdog_clear_off=1 -> Turn off SMI clearing watchdog when iTCO_version=1
      				 (ICHO till ICH5 + 6300ESB only)
      turn_SMI_watchdog_clear_off=2 -> Turn off SMI clearing watchdog.
      Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
      0d098587
    • Keith Packard's avatar
      drm/i915: Disable RC6 on Sandybridge by default · 371de6e4
      Keith Packard authored
      RC6 fails again.
      
      > I found my system freeze mostly during starting up X and KDE. Sometimes it
      > works for some minutes, sometimes it freezes immediatly. When the freeze
      > happens, everything is dead (even the reset button does not work, I need to
      > power cycle).
      
      > I disabled RC6, and my system runs wonderfully.
      
      > The system is a Z68 Pro board with Sandybridge i5-2500K processor, 8
      > GB of RAM and UEFI firmware.
      Reported-by: default avatarKai Krakow <hurikhan77@gmail.com>
      Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      371de6e4
    • Keith Packard's avatar
      drm/i915: Disable semaphores by default on SNB · ebbd857e
      Keith Packard authored
      Semaphores still cause problems on some machines:
      
      > From Udo Steinberg:
      >
      > With Linux-3.2-rc6 I'm frequently seeing GPU hangs when large amounts of
      > text scroll in an xterm, such as when extracting a tar archive. Such as this
      > one (note the timestamps):
      >
      >  I can reproduce it fairly easily with something
      >  as simple as:
      >
      >	  while true; do dmesg; done
      
      This patch turns them off on SNB while leaving them on for IVB.
      Reported-by: default avatarUdo Steinberg <udo@hypervisor.org>
      Cc: Daniel Vetter <daniel@ffwll.ch>
      Cc: Eugeni Dodonov <eugeni@dodonov.net>
      Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      ebbd857e
  5. 26 Dec, 2011 11 commits
  6. 25 Dec, 2011 4 commits
  7. 24 Dec, 2011 8 commits
  8. 23 Dec, 2011 1 commit