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Will Deacon 446a5a8b1e ARM: 6205/1: perf: ensure counter delta is treated as unsigned 
Hardware performance counters on ARM are 32-bits wide but atomic64_t
variables are used to represent counter data in the hw_perf_event structure.

The armpmu_event_update function right-shifts a signed 64-bit delta variable
and adds the result to the event count. This can lead to shifting in sign-bits
if the MSB of the 32-bit counter value is set. This results in perf output
such as:

 Performance counter stats for 'sleep 20':

 18446744073460670464  cycles             <-- 0xFFFFFFFFF12A6000
        7783773  instructions             #      0.000 IPC
            465  context-switches
            161  page-faults
        1172393  branches

   20.154242147  seconds time elapsed

This patch ensures that the delta value is treated as unsigned so that the
right shift sets the upper bits to zero.

Cc: <stable@kernel.org>
Acked-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-07-04 23:11:37 +01:00
..
boot ARM: arch/arm/boot/bootp/bootp.lds: Checkpatch cleanup 2010-05-24 20:40:09 +01:00
common ARM: 6146/1: sa1111: Prevent deadlock in resume path 2010-05-27 10:36:08 +01:00
configs ARM: s3c2410_defconfig: Add new machines 2010-05-28 19:33:05 +09:00
include/asm Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 2010-07-01 10:16:04 +01:00
kernel ARM: 6205/1: perf: ensure counter delta is treated as unsigned 2010-07-04 23:11:37 +01:00
lib ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabled 2010-05-08 10:45:26 +01:00
mach-aaec2000 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-at91 ARM: mach-at91: duplicated include 2010-05-24 20:40:13 +01:00
mach-bcmring Merge branch 'devel-stable' into devel 2010-05-17 17:24:04 +01:00
mach-clps711x ARM: arch/arm/mach-clps711x/Makefile.boot: Checkpatch cleanup 2010-05-24 20:40:09 +01:00
mach-cns3xxx ARM: cns3xxx: Add CNS3420 Validation Board support 2010-05-02 21:55:49 +04:00
mach-davinci davinci: da850 TPS6507x touch screen driver board data 2010-05-28 01:37:39 +02:00
mach-dove Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00
mach-ebsa110 ARM: 5910/1: ARM: Add tmp register for addruart and loadsp 2010-02-12 17:27:52 +00:00
mach-ep93xx Merge remote branch 'origin' into secretlab/next-spi 2010-05-25 00:38:26 -06:00
mach-footbridge ARM: arch/arm/mach-footbridge/ebsa285-pci.c: Checkpatch cleanup 2010-05-24 20:40:10 +01:00
mach-gemini Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm 2010-03-01 09:15:15 -08:00
mach-h720x ARM: arch/arm/mach-h720x/common.h: Checkpatch cleanup 2010-05-24 20:40:10 +01:00
mach-integrator Merge branch 'devel-stable' into devel 2010-05-17 17:24:04 +01:00
mach-iop13xx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-iop32x Merge branch 'devel-stable' into devel 2010-05-17 17:24:04 +01:00
mach-iop33x include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-ixp4xx Merge branch 'devel-stable' into devel 2010-05-17 17:24:04 +01:00
mach-ixp23xx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-ixp2000 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-kirkwood Merge git://git.infradead.org/mtd-2.6 2010-05-21 07:25:43 -07:00
mach-ks8695 ARM: 5910/1: ARM: Add tmp register for addruart and loadsp 2010-02-12 17:27:52 +00:00
mach-l7200 ARM: 5910/1: ARM: Add tmp register for addruart and loadsp 2010-02-12 17:27:52 +00:00
mach-lh7a40x include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-loki Merge branch 'misc2' into devel 2010-02-25 22:09:41 +00:00
mach-mmp [ARM] mmp: append device support in jasper 2010-05-11 17:25:06 +02:00
mach-msm msm: dma: add completion.h header 2010-06-07 16:16:33 -07:00
mach-mv78xx0 Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00
mach-mx1 Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00
mach-mx2 Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2010-05-25 12:06:33 -07:00
mach-mx3 ARM: mx3: mx31lilly: fix build error for !CONFIG_USB_ULPI 2010-07-01 09:52:39 +02:00
mach-mx5 Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable 2010-05-20 23:43:18 +01:00
mach-mx25 arm/mx25: add watchdog device 2010-05-18 08:32:33 +02:00
mach-mxc91231 Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00
mach-netx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-nomadik ARM: 6145/1: ux500 MTU clockrate correction 2010-05-27 10:36:08 +01:00
mach-ns9xxx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-nuc93x
mach-omap1 Merge branch 'omap4-i2c-init' into omap-for-linus 2010-05-20 11:37:23 -07:00
mach-omap2 Merge branch 'for_2.6.35rc' of git://git.pwsan.com/linux-2.6 into omap-fixes-for-linus 2010-06-28 15:47:04 +03:00
mach-orion5x leds: leds-gpio: Change blink_set callback to be able to turn off blinking 2010-05-26 13:07:55 +01:00
mach-pnx4008 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-pxa [ARM] pxa/mioa701: fix camera regression 2010-06-13 23:55:15 +08:00
mach-realview ARM: 6201/1: RealView: Do not use outer_sync() on ARM11MPCore boards with L220 2010-07-02 10:10:09 +01:00
mach-rpc include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
mach-s3c24a0/include/mach Merge branch 'origin' into devel-stable 2010-03-08 20:21:04 +00:00
mach-s3c64xx ARM: S3C64XX: Add USB OTG HCLK to the list of clocks 2010-05-28 19:31:34 +09:00
mach-s3c2400
mach-s3c2410 ARM: SAMSUNG: Move WDT device definitions in plat-samsung 2010-05-20 19:44:18 +09:00
mach-s3c2412 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 2010-05-20 09:41:44 -07:00
mach-s3c2416 ARM: SMDK2416: Add support for framebuffer device and ensure correct setup 2010-05-18 18:46:30 +09:00
mach-s3c2440 gta02: Use pcf50633 backlight driver instead of platform backlight driver. 2010-05-26 17:34:40 +01:00
mach-s3c2443 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-05-20 09:20:59 -07:00
mach-s5p6440 ARM: S5P: Fix the platform external interrupt issues. 2010-05-26 19:09:50 +09:00
mach-s5p6442 ARM: S5P: Fix the platform external interrupt issues. 2010-05-26 19:09:50 +09:00
mach-s5pc100 ARM: S5PC100: Fixup cross tree merge problems 2010-05-26 19:09:50 +09:00
mach-s5pv210 ARM: S5P: Fix the platform external interrupt issues. 2010-05-26 19:09:50 +09:00
mach-sa1100 ARM: arch/arm/mach-sa1100/leds.c: Checkpatch cleanup 2010-05-24 20:40:11 +01:00
mach-shark ARM: arch/arm/mach-shark/pci.c: Checkpatch cleanup 2010-05-24 20:40:11 +01:00
mach-shmobile ARM: remove 'select GENERIC_TIME' 2010-05-18 08:17:56 +01:00
mach-spear3xx ARM: 6091/1: ST SPEAr: Adding support for shared irq layer 2010-05-04 16:54:54 +01:00
mach-spear6xx ARM: SPEAR6xx: remove duplicated #include 2010-05-24 20:39:52 +01:00
mach-stmp37xx
mach-stmp378x
mach-u300 ARM: AB3550 board configuration and irq for U300 2010-05-28 01:37:47 +02:00
mach-ux500 Merge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 2010-06-08 19:40:08 +01:00
mach-versatile Merge branch 'devel-stable' into devel 2010-05-17 17:24:04 +01:00
mach-vexpress ARM: 6192/1: VExpress: Align the machine_desc.phys_io to 1MB section 2010-07-01 10:13:41 +01:00
mach-w90x900 ARM: 6141/1: Add audio support part in arch/arm/mach-w90x900 2010-05-24 22:25:34 +01:00
mm ARM: 6202/1: Do not ARM_DMA_MEM_BUFFERABLE on RealView boards with L210/L220 2010-07-02 10:10:20 +01:00
nwfpe ARM: arch/arm/nwfpe/fpsr.h: Checkpatch cleanup 2010-05-24 20:40:12 +01:00
oprofile ARM: 6074/1: oprofile: convert from sysdev to platform device 2010-05-17 11:53:59 +01:00
plat-iop ARM: 6048/1: ARM: iop3xx: register PMU IRQs during board initialisation 2010-04-29 18:03:49 +01:00
plat-mxc Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable 2010-05-20 23:43:18 +01:00
plat-nomadik ARM: 6145/1: ux500 MTU clockrate correction 2010-05-27 10:36:08 +01:00
plat-omap omap: GPIO: fix auto-disable of debounce clock 2010-06-10 15:37:41 +03:00
plat-orion mtd: orion/kirkwood: add RnB line support to orion mtd driver 2010-05-14 01:04:19 +01:00
plat-pxa [ARM] mmp: fix build failure due to IRQ_PMU depends on ARCH_PXA 2010-06-14 00:45:26 +08:00
plat-s3c24xx ARM: SAMSUNG: Move WDT device definitions in plat-samsung 2010-05-20 19:44:18 +09:00
plat-s5p ARM: S5P: Regoster clk_xusbxti clock for hsotg driver 2010-05-28 19:31:34 +09:00
plat-samsung ARM: SAMSUNG: gpio-cfg.h: update documentation 2010-05-28 19:31:32 +09:00
plat-spear ARM: 6091/1: ST SPEAr: Adding support for shared irq layer 2010-05-04 16:54:54 +01:00
plat-stmp3xxx include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
plat-versatile ARM: Indirect round/set_rate operations through clk structure 2010-05-02 09:35:38 +01:00
tools ARM: Update mach-types 2010-05-01 11:32:58 +01:00
vfp ARM: VFP: Fix vfp_put_double() for d16-d31 2010-05-27 10:32:06 +01:00
Kconfig ARM: 6195/1: OMAP3: pmu: make CPU_HAS_PMU dependent on OMAP3_EMU 2010-07-01 10:13:58 +01:00
Kconfig-nommu
Kconfig.debug ARM: SAMSUNG: Move plat-s3c Kconfig entries to plat-samsung and plat-s3c24xx 2010-02-24 01:52:06 +00:00
Makefile Merge branch 'for-rmk/samsung3' of git://git.fluff.org/bjdooks/linux into devel-stable 2010-05-24 23:08:36 +01:00