1. 31 May, 2013 9 commits
  2. 30 May, 2013 10 commits
    • Pekka Riikonen's avatar
      x86: Allow FPU to be used at interrupt time even with eagerfpu · 5187b28f
      Pekka Riikonen authored
      With the addition of eagerfpu the irq_fpu_usable() now returns false
      negatives especially in the case of ksoftirqd and interrupted idle task,
      two common cases for FPU use for example in networking/crypto.  With
      eagerfpu=off FPU use is possible in those contexts.  This is because of
      the eagerfpu check in interrupted_kernel_fpu_idle():
      
      ...
        * For now, with eagerfpu we will return interrupted kernel FPU
        * state as not-idle. TBD: Ideally we can change the return value
        * to something like __thread_has_fpu(current). But we need to
        * be careful of doing __thread_clear_has_fpu() before saving
        * the FPU etc for supporting nested uses etc. For now, take
        * the simple route!
      ...
       	if (use_eager_fpu())
       		return 0;
      
      As eagerfpu is automatically "on" on those CPUs that also have the
      features like AES-NI this patch changes the eagerfpu check to return 1 in
      case the kernel_fpu_begin() has not been said yet.  Once it has been the
      __thread_has_fpu() will start returning 0.
      
      Notice that with eagerfpu the __thread_has_fpu is always true initially.
      FPU use is thus always possible no matter what task is under us, unless
      the state has already been saved with kernel_fpu_begin().
      
      [ hpa: this is a performance regression, not a correctness regression,
        but since it can be quite serious on CPUs which need encryption at
        interrupt time I am marking this for urgent/stable. ]
      Signed-off-by: default avatarPekka Riikonen <priikone@iki.fi>
      Link: http://lkml.kernel.org/r/alpine.GSO.2.00.1305131356320.18@git.silcnet.org
      Cc: <stable@vger.kernel.org> v3.7+
      Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      5187b28f
    • Jan Beulich's avatar
      x86, crc32-pclmul: Fix build with older binutils · 2baad612
      Jan Beulich authored
      binutils prior to 2.18 (e.g. the ones found on SLE10) don't support
      assembling PEXTRD, so a macro based approach like the one for PCLMULQDQ
      in the same file should be used.
      
      This requires making the helper macros capable of recognizing 32-bit
      general purpose register operands.
      
      [ hpa: tagging for stable as it is a low risk build fix ]
      Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
      Link: http://lkml.kernel.org/r/51A6142A02000078000D99D8@nat28.tlf.novell.com
      Cc: Alexander Boyko <alexander_boyko@xyratex.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: Huang Ying <ying.huang@intel.com>
      Cc: <stable@vger.kernel.org> v3.9
      Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      2baad612
    • Linus Torvalds's avatar
      Merge tag 'stable/for-linus-3.10-rc3-tag' of... · 3655b22d
      Linus Torvalds authored
      Merge tag 'stable/for-linus-3.10-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
      
      Pull Xen fixes from Konrad Rzeszutek Wilk:
       - Use proper error paths
       - Clean up APIC IPI usage (incorrect arguments)
       - Delay XenBus frontend resume is backend (xenstored) is not running
       - Fix build error with various combinations of CONFIG_
      
      * tag 'stable/for-linus-3.10-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
        xenbus_client.c: correct exit path for xenbus_map_ring_valloc_hvm
        xen-pciback: more uses of cached MSI-X capability offset
        xen: Clean up apic ipi interface
        xenbus: save xenstore local status for later use
        xenbus: delay xenbus frontend resume if xenstored is not running
        xmem/tmem: fix 'undefined variable' build error.
      3655b22d
    • Jean-Christophe PLAGNIOL-VILLARD's avatar
      MAINTAINERS: Framebuffer Layer maintainers update · 5489e948
      Jean-Christophe PLAGNIOL-VILLARD authored
      Tomi and I will now take care of the Framebuffer Layer
      
      The git tree is now on kernel.org
      Signed-off-by: default avatarJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
      Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
      Cc: Olof Johansson <olof@lixom.net>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
      Cc: linux-fbdev@vger.kernel.org
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      5489e948
    • Linus Torvalds's avatar
      Merge tag 'sound-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 5c1dfc82
      Linus Torvalds authored
      Pull sound updates from Takashi Iwai:
       "Again very calm updates at this time.
      
        All small fixes for individual drivers, mostly ASoC codecs, in
        addition to soc-compress fix for capture streams which is safe to
        apply as there is no in-tree users yet."
      
      * tag 'sound-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
        ASoC: cs42l52: fix default value for MASTERA_VOL.
        ASoC: wm8994: check for array index returned
        ASoC: wm8994: Fix reporting of accessory removal on WM8958
        ASoC: wm8994: use the correct pointer to get the control value
        ASoC: wm5110: Correct DSP4R Mixer control name
        ALSA: usb-6fire: Modify firmware version check
        ASoC: cs42l52: fix master playback mute mask.
        ASoC: cs42l52: fix bogus shifts in "Speaker Volume" and "PCM Mixer Volume" controls.
        ASoC: cs42l52: microphone bias is controlled by IFACE_CTL2 register.
        ASoC: davinci: fix sample rotation
        ASoC: wm5110: Add missing speaker initialisation
        ASoC: soc-compress: Send correct stream event for capture start
        ASoC: max98090: request IRQF_ONESHOT interrupt
      5c1dfc82
    • Linus Torvalds's avatar
      Merge branch 'mn10300' (mn10300 fixes from David Howells) · dcdbe33a
      Linus Torvalds authored
      Merge mn10300 fixes from David Howells.
      
      * emailed patches from David Howells <dhowells@redhat.com>:
        MN10300: Need pci_iomap() and __pci_ioport_map() defining
        MN10300: ASB2305's PCI code needs the definition of XIRQ1
        MN10300: Enable IRQs more in system call exit work path
        MN10300: Fix ret_from_kernel_thread
      dcdbe33a
    • David Howells's avatar
      MN10300: Need pci_iomap() and __pci_ioport_map() defining · 1aeeac7a
      David Howells authored
      Include the generic definitions of pci_iomap() and __pci_ioport_map()
      otherwise we can get errors like:
      
        lib/pci_iomap.c: In function 'pci_iomap':
        lib/pci_iomap.c:37: error: implicit declaration of function '__pci_ioport_map'
        lib/pci_iomap.c:37: warning: return makes pointer from integer without a cast
      
      and:
      
        drivers/pci/quirks.c: In function 'disable_igfx_irq':
        drivers/pci/quirks.c:2893: error: implicit declaration of function 'pci_iomap'
        drivers/pci/quirks.c:2893: warning: initialization makes pointer from integer without a cast
        drivers/pci/quirks.c: In function 'reset_ivb_igd':
        drivers/pci/quirks.c:3133: warning: assignment makes pointer from integer without a cast
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarKen Cox <jkc@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1aeeac7a
    • David Howells's avatar
      MN10300: ASB2305's PCI code needs the definition of XIRQ1 · b8bc9b02
      David Howells authored
      The code for PCI in the ASB2305 needs the definition of XIRQ1 from proc/irq.h
      otherwise the following error appears:
      
        arch/mn10300/unit-asb2305/pci.c: In function 'unit_pci_init':
        arch/mn10300/unit-asb2305/pci.c:481: error: 'XIRQ1' undeclared (first use in this function)
        arch/mn10300/unit-asb2305/pci.c:481: error: (Each undeclared identifier is reported only once
        arch/mn10300/unit-asb2305/pci.c:481: error: for each function it appears in.)
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarKen Cox <jkc@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b8bc9b02
    • David Howells's avatar
      MN10300: Enable IRQs more in system call exit work path · d17fc238
      David Howells authored
      Enable IRQs when calling schedule() for TIF_NEED_RESCHED and
      do_notify_resume().  If interrupts are enabled during do_notify_resume(), a
      warning can be seen (see lower down).
      
      Whilst we're at it, resume_userspace can be made local to entry.S as it is not
      called outside of there and it can be merged with the part of work_resched that
      occurs after schedule() is called.
      
        WARNING: at kernel/softirq.c:160 local_bh_enable+0x42/0xa0()
        Call Trace:
          local_bh_enable+0x42/0xa0
          unix_release_sock+0x86/0x23c
          unix_release+0x20/0x28
          sock_release+0x17/0x88
          sock_close+0x20/0x28
          __fput+0xc9/0x1fc
          ____fput+0xb/0x10
          task_work_run+0x64/0x78
          do_notify_resume+0x53d/0x544
          work_notifysig+0xa/0xc
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarKen Cox <jkc@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d17fc238
    • David Howells's avatar
      MN10300: Fix ret_from_kernel_thread · 1e00227d
      David Howells authored
      ret_from_kernel_thread needs to set A2 to the thread_info pointer before
      jumping to syscall_exit.
      
      Without this, we never correctly start userspace.
      
      This was caused by the rejuggling of the fork/exec paths in commit
      ddf23e87 ("mn10300: switch to saner kernel_execve() semantics")
      Reported-by: default avatarKen Cox <jkc@redhat.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Acked-by: default avatarKen Cox <jkc@redhat.com>
      Acked-by: default avatarAl Viro <viro@ZenIV.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1e00227d
  3. 29 May, 2013 17 commits
  4. 28 May, 2013 4 commits
    • Zhang Yanfei's avatar
      x86-64, init: Fix a possible wraparound bug in switchover in head_64.S · e9d0626e
      Zhang Yanfei authored
      In head_64.S, a switchover has been used to handle kernel crossing
      1G, 512G boundaries.
      
      And commit 8170e6be
          x86, 64bit: Use a #PF handler to materialize early mappings on demand
      said:
          During the switchover in head_64.S, before #PF handler is available,
          we use three pages to handle kernel crossing 1G, 512G boundaries with
          sharing page by playing games with page aliasing: the same page is
          mapped twice in the higher-level tables with appropriate wraparound.
      
      But from the switchover code, when we set up the PUD table:
      114         addq    $4096, %rdx
      115         movq    %rdi, %rax
      116         shrq    $PUD_SHIFT, %rax
      117         andl    $(PTRS_PER_PUD-1), %eax
      118         movq    %rdx, (4096+0)(%rbx,%rax,8)
      119         movq    %rdx, (4096+8)(%rbx,%rax,8)
      
      It seems line 119 has a potential bug there. For example,
      if the kernel is loaded at physical address 511G+1008M, that is
          000000000 111111111 111111000 000000000000000000000
      and the kernel _end is 512G+2M, that is
          000000001 000000000 000000001 000000000000000000000
      So in this example, when using the 2nd page to setup PUD (line 114~119),
      rax is 511.
      In line 118, we put rdx which is the address of the PMD page (the 3rd page)
      into entry 511 of the PUD table. But in line 119, the entry we calculate from
      (4096+8)(%rbx,%rax,8) has exceeded the PUD page. IMO, the entry in line
      119 should be wraparound into entry 0 of the PUD table.
      
      The patch fixes the bug.
      Signed-off-by: default avatarZhang Yanfei <zhangyanfei@cn.fujitsu.com>
      Link: http://lkml.kernel.org/r/5191DE5A.3020302@cn.fujitsu.comSigned-off-by: default avatarYinghai Lu <yinghai@kernel.org>
      Cc: <stable@vger.kernel.org> v3.9
      Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
      e9d0626e
    • J. Bruce Fields's avatar
      svcrpc: implement O_NONBLOCK behavior for use-gss-proxy · b161c144
      J. Bruce Fields authored
      Somebody noticed LTP was complaining about O_NONBLOCK opens of
      /proc/net/rpc/use-gss-proxy succeeding and then a following read
      hanging.
      
      I'm not convinced LTP really has any business opening random proc files
      and expecting them to behave a certain way.  Maybe this isn't really a
      bug.
      
      But in any case the O_NONBLOCK behavior could be useful for someone that
      wants to test whether gss-proxy is up without waiting.
      Reported-by: default avatarJan Stancek <jstancek@redhat.com>
      Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
      b161c144
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 58f8bbd2
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "This is mostly exynos and intel fixes, along with some vblank patches
        I lost from Rob a few months ago that make wayland work better on lots
        of GPUs, also a qxl kconfig fix."
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (22 commits)
        qxl: fix Kconfig deps - select FB_DEFERRED_IO
        drm/exynos: replace request_threaded_irq with devm function
        drm/exynos: remove unnecessary devm_kfree
        drm/exynos: fix build warnings from ipp fimc
        drm/exynos: cleanup device pointer usages
        drm/exynos: wait for the completion of pending page flip
        drm/exynos: use drm_send_vblank_event() helper
        drm/i915: avoid premature DP AUX timeouts
        drm/i915: avoid premature timeouts in __wait_seqno()
        drm/i915: use msecs_to_jiffies_timeout instead of open coding the same
        drm/i915: add msecs_to_jiffies_timeout to guarantee minimum duration
        drm/i915: force full modeset if the connector is in DPMS OFF mode
        drm/exynos: page flip fixes
        drm/exynos: exynos_hdmi: Pass correct pointer to free_irq()
        drm/exynos: exynos_drm_ipp: Fix incorrect usage of IS_ERR_OR_NULL
        drm/exynos: exynos_drm_fbdev: Fix incorrect usage of IS_ERR_OR_NULL
        drm/imx: use drm_send_vblank_event() helper
        drm/shmob: use drm_send_vblank_event() helper
        drm/radeon: use drm_send_vblank_event() helper
        drm/nouveau: use drm_send_vblank_event() helper
        ...
      58f8bbd2
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 30a9e501
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
       "This push fixes a crash in the new sha256_ssse3 driver as well as a
        DMA setup/teardown bug in caam"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: sha256_ssse3 - fix stack corruption with SSSE3 and AVX implementations
        crypto: caam - fix inconsistent assoc dma mapping direction
      30a9e501