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  1. 16 9月, 2012 3 次提交
    • A
      ARM: 7520/1: Build dtb files in all target · e50a622d
      由 Andrew Lunn 提交于 
      Tools like kisskb are good at finding build regressions in the kernel
sources. However, regressions in the DT desscriptions are not found,
because generally these build systems don't build the DT binary blobs.

Extend the ARM all target to build all enabled DTB files.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NJason Cooper <jason@lakedaemon.net>
Reviewed-by: NDave Martin <dave.martin@linaro.org>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      e50a622d
    • R
      ARM: Fix build warning in arch/arm/mm/alignment.c · a761cebf
      由 Russell King 提交于 
      Fix this harmless build warning:

arch/arm/mm/alignment.c: In function 'do_alignment':
arch/arm/mm/alignment.c:749:21: warning: 'offset.un' may be used uninitialized in this function

This is caused by the compiler not being able to properly analyse the
code to prove that offset.un is assigned in every case.  The case it
struggles with is where we assign the handler from the Thumb parser -
do_alignment_t32_to_handler().  As this starts by zeroing this variable
via a pointer, move it into the calling function.  This fixes the
warning.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      a761cebf
    • R
      ARM: Add irqtime accounting support · a42c3629
      由 Russell King 提交于 
      Add support for irq time accounting.  This commit prepares ARM by adding
the call to enable_sched_clock_irqtime() in sched_clock().  We introduce
a new kernel parameter - irqtime - which takes an integer.  -1 for auto,
0 for disabled, and 1 for enabled.  Auto mode selects IRQ accounting if
we have a sched_clock() tick rate greater than 1MHz.

Frederic Weisbecker is working on a patch set which moves the
IRQ_TIME_ACCOUNTING into arch/, so that part is not incorporated into
this patch; this facility becomes available on ARM only when both this
patch and Frederic's patches are merged.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      a42c3629
  3. 02 9月, 2012 1 次提交
  5. 25 8月, 2012 7 次提交
    • W
      ARM: 7500/1: io: avoid writeback addressing modes for __raw_ accessors · 195bbcac
      由 Will Deacon 提交于 
      Data aborts taken to hyp mode do not provide a valid instruction
syndrome field in the HSR if the faulting instruction is a memory
access using a writeback addressing mode.

For hypervisors emulating MMIO accesses to virtual peripherals, taking
such an exception requires disassembling the faulting instruction in
order to determine the behaviour of the access. Since this requires
manually walking the two stages of translation, the world must be
stopped to prevent races against page aging in the guest, where the
first-stage translation is invalidated after the hypervisor has
translated to an IPA and the physical page is reused for something else.

This patch avoids taking this heavy performance penalty when running
Linux as a guest by ensuring that our I/O accessors do not make use of
writeback addressing modes.

Cc: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      195bbcac
    • S
      ARM: 7498/1: mach-shmobile: Use SGI0 to wake secondary CPUs · e91d5d91
      由 Stephen Boyd 提交于 
      Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      e91d5d91
    • W
      ARM: 7495/1: mutex: use generic atomic_dec-based implementation for ARMv6+ · 08928e7a
      由 Will Deacon 提交于 
      Commit a76d7bd9 ("ARM: 7467/1: mutex: use generic xchg-based
implementation for ARMv6+") removed the barrier-less, ARM-specific
mutex implementation in favour of the generic xchg-based code.

Since then, a bug was uncovered in the xchg code when running on SMP
platforms, due to interactions between the locking paths and the
MUTEX_SPIN_ON_OWNER code. This was fixed in 0bce9c46 ("mutex: place
lock in contended state after fastpath_lock failure"), however, the
atomic_dec-based mutex algorithm is now marginally more efficient for
ARM (~0.5% improvement in hackbench scores on dual A15).

This patch moves ARMv6+ platforms to the atomic_dec-based mutex code.
Acked-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      08928e7a
    • R
      ARM: 7494/1: use generic termios.h · e780c452
      由 Rob Herring 提交于 
      As pointed out by Arnd Bergmann, this fixes a couple of issues but will
increase code size:

The original macro user_termio_to_kernel_termios was not endian safe. It
used an unsigned short ptr to access the low bits in a 32-bit word.

Both user_termio_to_kernel_termios and kernel_termios_to_user_termio are
missing error checking on put_user/get_user and copy_to/from_user.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Reviewed-by: NNicolas Pitre <nico@linaro.org>
Tested-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      e780c452
    • R
      ARM: 7493/1: use generic unaligned.h · d25c881a
      由 Rob Herring 提交于 
      This moves ARM over to the asm-generic/unaligned.h header. This has the
benefit of better code generated especially for ARMv7 on gcc 4.7+
compilers.

As Arnd Bergmann, points out: The asm-generic version uses the "struct"
version for native-endian unaligned access and the "byteshift" version
for the opposite endianess. The current ARM version however uses the
"byteshift" implementation for both.

Thanks to Nicolas Pitre for the excellent analysis:

Test case:

int foo (int *x) { return get_unaligned(x); }
long long bar (long long *x) { return get_unaligned(x); }

With the current ARM version:

foo:
	ldrb	r3, [r0, #2]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 2B], MEM[(const u8 *)x_1(D) + 2B]
	ldrb	r1, [r0, #1]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 1B], MEM[(const u8 *)x_1(D) + 1B]
	ldrb	r2, [r0, #0]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D)], MEM[(const u8 *)x_1(D)]
	mov	r3, r3, asl #16	@ tmp154, MEM[(const u8 *)x_1(D) + 2B],
	ldrb	r0, [r0, #3]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 3B], MEM[(const u8 *)x_1(D) + 3B]
	orr	r3, r3, r1, asl #8	@, tmp155, tmp154, MEM[(const u8 *)x_1(D) + 1B],
	orr	r3, r3, r2	@ tmp157, tmp155, MEM[(const u8 *)x_1(D)]
	orr	r0, r3, r0, asl #24	@,, tmp157, MEM[(const u8 *)x_1(D) + 3B],
	bx	lr	@

bar:
	stmfd	sp!, {r4, r5, r6, r7}	@,
	mov	r2, #0	@ tmp184,
	ldrb	r5, [r0, #6]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 6B], MEM[(const u8 *)x_1(D) + 6B]
	ldrb	r4, [r0, #5]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 5B], MEM[(const u8 *)x_1(D) + 5B]
	ldrb	ip, [r0, #2]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 2B], MEM[(const u8 *)x_1(D) + 2B]
	ldrb	r1, [r0, #4]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 4B], MEM[(const u8 *)x_1(D) + 4B]
	mov	r5, r5, asl #16	@ tmp175, MEM[(const u8 *)x_1(D) + 6B],
	ldrb	r7, [r0, #1]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 1B], MEM[(const u8 *)x_1(D) + 1B]
	orr	r5, r5, r4, asl #8	@, tmp176, tmp175, MEM[(const u8 *)x_1(D) + 5B],
	ldrb	r6, [r0, #7]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 7B], MEM[(const u8 *)x_1(D) + 7B]
	orr	r5, r5, r1	@ tmp178, tmp176, MEM[(const u8 *)x_1(D) + 4B]
	ldrb	r4, [r0, #0]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D)], MEM[(const u8 *)x_1(D)]
	mov	ip, ip, asl #16	@ tmp188, MEM[(const u8 *)x_1(D) + 2B],
	ldrb	r1, [r0, #3]	@ zero_extendqisi2	@ MEM[(const u8 *)x_1(D) + 3B], MEM[(const u8 *)x_1(D) + 3B]
	orr	ip, ip, r7, asl #8	@, tmp189, tmp188, MEM[(const u8 *)x_1(D) + 1B],
	orr	r3, r5, r6, asl #24	@,, tmp178, MEM[(const u8 *)x_1(D) + 7B],
	orr	ip, ip, r4	@ tmp191, tmp189, MEM[(const u8 *)x_1(D)]
	orr	ip, ip, r1, asl #24	@, tmp194, tmp191, MEM[(const u8 *)x_1(D) + 3B],
	mov	r1, r3	@,
	orr	r0, r2, ip	@ tmp171, tmp184, tmp194
	ldmfd	sp!, {r4, r5, r6, r7}
	bx	lr

In both cases the code is slightly suboptimal.  One may wonder why
wasting r2 with the constant 0 in the second case for example.  And all
the mov's could be folded in subsequent orr's, etc.

Now with the asm-generic version:

foo:
	ldr	r0, [r0, #0]	@ unaligned	@,* x
	bx	lr	@

bar:
	mov	r3, r0	@ x, x
	ldr	r0, [r0, #0]	@ unaligned	@,* x
	ldr	r1, [r3, #4]	@ unaligned	@,
	bx	lr	@

This is way better of course, but only because this was compiled for
ARMv7. In this case the compiler knows that the hardware can do
unaligned word access.  This isn't that obvious for foo(), but if we
remove the get_unaligned() from bar as follows:

long long bar (long long *x) {return *x; }

then the resulting code is:

bar:
	ldmia	r0, {r0, r1}	@ x,,
	bx	lr	@

So this proves that the presumed aligned vs unaligned cases does have
influence on the instructions the compiler may use and that the above
unaligned code results are not just an accident.

Still... this isn't fully conclusive without at least looking at the
resulting assembly fron a pre ARMv6 compilation.  Let's see with an
ARMv5 target:

foo:
	ldrb	r3, [r0, #0]	@ zero_extendqisi2	@ tmp139,* x
	ldrb	r1, [r0, #1]	@ zero_extendqisi2	@ tmp140,
	ldrb	r2, [r0, #2]	@ zero_extendqisi2	@ tmp143,
	ldrb	r0, [r0, #3]	@ zero_extendqisi2	@ tmp146,
	orr	r3, r3, r1, asl #8	@, tmp142, tmp139, tmp140,
	orr	r3, r3, r2, asl #16	@, tmp145, tmp142, tmp143,
	orr	r0, r3, r0, asl #24	@,, tmp145, tmp146,
	bx	lr	@

bar:
	stmfd	sp!, {r4, r5, r6, r7}	@,
	ldrb	r2, [r0, #0]	@ zero_extendqisi2	@ tmp139,* x
	ldrb	r7, [r0, #1]	@ zero_extendqisi2	@ tmp140,
	ldrb	r3, [r0, #4]	@ zero_extendqisi2	@ tmp149,
	ldrb	r6, [r0, #5]	@ zero_extendqisi2	@ tmp150,
	ldrb	r5, [r0, #2]	@ zero_extendqisi2	@ tmp143,
	ldrb	r4, [r0, #6]	@ zero_extendqisi2	@ tmp153,
	ldrb	r1, [r0, #7]	@ zero_extendqisi2	@ tmp156,
	ldrb	ip, [r0, #3]	@ zero_extendqisi2	@ tmp146,
	orr	r2, r2, r7, asl #8	@, tmp142, tmp139, tmp140,
	orr	r3, r3, r6, asl #8	@, tmp152, tmp149, tmp150,
	orr	r2, r2, r5, asl #16	@, tmp145, tmp142, tmp143,
	orr	r3, r3, r4, asl #16	@, tmp155, tmp152, tmp153,
	orr	r0, r2, ip, asl #24	@,, tmp145, tmp146,
	orr	r1, r3, r1, asl #24	@,, tmp155, tmp156,
	ldmfd	sp!, {r4, r5, r6, r7}
	bx	lr

Compared to the initial results, this is really nicely optimized and I
couldn't do much better if I were to hand code it myself.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Reviewed-by: NNicolas Pitre <nico@linaro.org>
Tested-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      d25c881a
    • R
      ARM: 7492/1: add strstr declaration for decompressors · ef1c2096
      由 Rob Herring 提交于 
      With the generic unaligned.h, more kernel headers get pulled in including
dynamic_debug.h which needs strstr. As it is not really used, we only need
a declaration here.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Tested-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      ef1c2096
    • R
      ARM: 7491/1: use generic version of identical asm headers · 4a8052d8
      由 Rob Herring 提交于 
      Inspired by the AArgh64 claim that it should be separate from ARM and one
reason was being able to use more asm-generic headers. Doing a diff of
arch/arm/include/asm and include/asm-generic there are numerous asm
headers which are functionally identical to their asm-generic counterparts.
Delete the ARM version and use the generic ones.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Reviewed-by: NNicolas Pitre <nico@linaro.org>
Tested-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      4a8052d8
  7. 13 8月, 2012 1 次提交
  9. 11 8月, 2012 1 次提交
  11. 09 8月, 2012 4 次提交
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · f4ba394c
      由 Linus Torvalds 提交于 
      Pull networking fixes from David Miller:

 1) Missed rcu_assign_pointer() in mac80211 scanning, from Johannes
    Berg.

 2) Allow devices to limit the number of segments that an individual
    TCP TSO packet can use at a time, to deal with device and/or driver
    specific limitations.  From Ben Hutchings.

 3) Fix unexpected hard IPSEC expiration after setting the date.  From
    Fan Du.

 4) Memory leak fix in bxn2x driver, from Jesper Juhl.

 5) Fix two memory leaks in libertas driver, from Daniel Drake.

 6) Fix deref of out-of-range array index in packet scheduler generic
    actions layer.  From Hiroaki SHIMODA.

 7) Fix TX flow control errors in mlx4 driver, from Yevgeny Petrilin.

 8) Fix CRIS eth_v10.c driver build, from Randy Dunlap.

 9) Fix wrong SKB freeing in LLC protocol layer, from Sorin Dumitru.

10) The IP output path checks neigh lookup errors incorrectly, it needs
    to use IS_ERR().  From Vasiliy Kulikov.

11) An estimator leak leads to deref of freed memory in timer handler,
    fix from Hiroaki SHIMODA.

12) TCP early demux in ipv6 needs to use DST cookies in order to
    validate the RX route properly.  Fix from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (43 commits)
  net: ipv6: fix TCP early demux
  net: Use PTR_RET rather than if(IS_ERR(.. [1]
  net_sched: act: Delete estimator in error path.
  ip: fix error handling in ip_finish_output2()
  llc: free the right skb
  ixp4xx_eth: fix ptp_ixp46x build failure
  drivers/atm/iphase.c: fix error return code
  tcp_output: fix sparse warning for tcp_wfree
  drivers/net/phy/mdio-mux-gpio.c: drop devm_kfree of devm_kzalloc'd data
  batman-adv: select an internet gateway if none was chosen
  mISDN: Bugfix for layer2 fixed TEI mode
  igb: don't break user visible strings over multiple lines in igb_ethtool.c
  igb: correct hardware type (i210/i211) check in igb_loopback_test()
  igb: Fix for failure to init on some 82576 devices.
  cris: fix eth_v10.c build error
  cdc-ncm: tag Ericsson WWAN devices (eg F5521gw) with FLAG_WWAN
  isdnloop: fix and simplify isdnloop_init()
  hyperv: Move wait completion msg code into rndis_filter_halt_device()
  net/mlx4_core: Remove port type restrictions
  net/mlx4_en: Fixing TX queue stop/wake flow
  ...
      f4ba394c
    • L
      Merge tag 'pinctrl-fixes-for-v3.6-rc1' of... · bf44ce83
      由 Linus Torvalds 提交于 
      Merge tag 'pinctrl-fixes-for-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

Pull pinctrl fixes from Linus Walleij:
 - Move MXS pinctrl registration to poscore_initcall
 - Fix up various devm_* managed resources code paths
 - Fix one function group in the Nomadik driver
 - Update MAINTAINERS

* tag 'pinctrl-fixes-for-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  drivers/pinctrl/pinctrl-nomadik.c: drop devm_kfree of devm_kzalloc'd data
  MAINTAINERS: fix a few pinctrl related entries
  pinctrl-sirf: remove devm_kfree at error path
  pinctrl/nomadik: fix hsi function group list
  pinctrl/pinctrl-u300: remove unneeded devm_kfree call
  pinctrl: mxs: register driver at postcore_initcall time
      bf44ce83
    • L
      Merge tag 'iommu-fixes-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu · 7f46f9c1
      由 Linus Torvalds 提交于 
      Pull IOMMU fixes from Joerg Roedel:
 "These patches fix a couple of issues.  First of all a few problems
  with ACS on x86 introduced in the last merge window, where ACS did not
  work on AMD and a NULL pointer dereference when there ran against
  SR-IOV devices.

  The patches fallen out of coccinelle checks fix a possible invalid
  memory reference and a possible memory leak.  The other patches mostly
  fix build errors and warnings and a wrong return value."

* tag 'iommu-fixes-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix ACS path checking
  iommu/intel: Fix ACS path checking
  iommu/amd: Fix pci_request_acs() call-place
  iommu/exynos: Fix build error
  iommu/tegra: smmu: Fix error initial value at domain_init
  iommu/tegra: smmu: Cleanup with lesser nest
  iommu: Add missing forward declaration in include file
  iommu: Include linux/types.h
  iommu/intel: add missing free_domain_mem
  iommu/tegra: remove invalid reference to list iterator variable
      7f46f9c1
    • L
      Merge tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound · 6666cabf
      由 Linus Torvalds 提交于 
      Pull sound fixes from Takashi Iwai:
 "Containing only a few really small/trivial fixes.  The only urgent fix
  is a regression fix of HDMI codec probing, introduced in 3.6-rc1.  The
  rest are HD-audio specific fixes and a copule of minor bug fixes in
  PCM core and the old emu10k1."

* tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - Fix double quirk for Quanta FL1 / Lenovo Ideapad
  ALSA: hda - Fix ugly debug prints with CONFIG_SND_VERBOSE_PRINTK=y
  ALSA: hda - remove redundant auto quirks for conexant 506x
  ALSA: hda - remove quirk for Dell Vostro 1015
  ALSA: hda - add dock support for Thinkpad X230
  ALSA: hda - Fix regression of HDMI codec probing
  ALSA: hda - add dock support for Thinkpad T430s
  ALSA: emu10k1: Avoid access to invalid pages when period=1
  ALSA: PCM: Fix possible memory leaks in the error path
      6666cabf
  13. 08 8月, 2012 2 次提交
  15. 07 8月, 2012 21 次提交