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2010-09-09rtc: m41t80: do not use rtc_valid_tm in m41t80_rtc_read_alarmAtsushi Nemoto1-1/+1
Commit b485fe5ea ("rtc/m41t80: use rtc_valid_tm() to check returned tm") added rtc_valid_tm to m41t80_rtc_read_alarm() but it was wrong while the t->time does not contain complete date/time. This patch also fixes a warning: warning: passing argument 1 of 'rtc_valid_tm' from incompatible pointer type Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09binfmt_misc: fix binfmt_misc priorityJan Sembera1-1/+1
Commit 74641f584da ("alpha: binfmt_aout fix") (May 2009) introduced a regression - binfmt_misc is now consulted after binfmt_elf, which will unfortunately break ia32el. ia32 ELF binaries on ia64 used to be matched using binfmt_misc and executed using wrapper. As 32bit binaries are now matched by binfmt_elf before bindmt_misc kicks in, the wrapper is ignored. The fix increases precedence of binfmt_misc to the original state. Signed-off-by: Jan Sembera <jsembera@suse.cz> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Richard Henderson <rth@twiddle.net Cc: <stable@kernel.org> [2.6.everything.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mm: avoid warning when COMPACTION is selectedAndrea Arcangeli1-1/+1
COMPACTION enables MIGRATION, but MIGRATION spawns a warning if numa or memhotplug aren't selected. However MIGRATION doesn't depend on them. I guess it's just trying to be strict doing a double check on who's enabling it, but it doesn't know that compaction also enables MIGRATION. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mm: fix swapin race conditionAndrea Arcangeli3-19/+43
The pte_same check is reliable only if the swap entry remains pinned (by the page lock on swapcache). We've also to ensure the swapcache isn't removed before we take the lock as try_to_free_swap won't care about the page pin. One of the possible impacts of this patch is that a KSM-shared page can point to the anon_vma of another process, which could exit before the page is freed. This can leave a page with a pointer to a recycled anon_vma object, or worse, a pointer to something that is no longer an anon_vma. [riel@redhat.com: changelog help] Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Hugh Dickins <hughd@google.com> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09drivers/mmc/host/imxmmc.c: adjust confusing if indentationJulia Lawall1-1/+2
Move the second if (reg & ...) test into the branch indicated by its indentation. The test was previously always executed after the if containing that branch, but it was always false unless the if branch was taken. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable braces4@ position p1,p2; statement S1,S2; @@ ( if (...) { ... } | if (...) S1@p1 S2@p2 ) @script:python@ p1 << r.p1; p2 << r.p2; @@ if (p1[0].column == p2[0].column): cocci.print_main("branch",p1) cocci.print_secs("after",p2) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Chris Ball <cjb@laptop.org> Cc: Pavel Pisa <ppisa@pikron.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09omap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspendEthan Du1-1/+1
If suspend called when kmmcd is doing host->ops->disable, as kmmcd already increased host->en_dis_recurs to 1, the mmc_host_enable in suspend function will return directly without increase the nesting_cnt, which will cause the followed register access carried out to the disabled host. mmc_suspend_host will enable host itself. No need to enable host before it. Also works on kmmcd will get flushed in mmc_suspend_host, enable host after it will be safe. So make the mmc_host_enable after it. [cjb: rebase against current Linus] Signed-off-by: Ethan <ethan.too@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org> Acked-by: Adrian Hunter <adrian.hunter@nokia.com> Acked-by: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mmc: at91_mci: add missing linux/highmem.h includeMarc Kleine-Budde1-0/+1
Fix the following error: at91_mci.c: In function 'at91_mci_sg_to_dma': at91_mci.c:236: error: implicit declaration of function 'kmap_atomic' at91_mci.c:236: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function) at91_mci.c:236: error: (Each undeclared identifier is reported only once at91_mci.c:236: error: for each function it appears in.) at91_mci.c:236: warning: assignment makes pointer from integer without a cast at91_mci.c:252: error: implicit declaration of function 'kunmap_atomic' at91_mci.c: In function 'at91_mci_post_dma_read': at91_mci.c:302: error: 'KM_BIO_SRC_IRQ' undeclared (first use in this function) at91_mci.c:302: warning: assignment makes pointer from integer without a cast at91_mci.c:317: error: implicit declaration of function 'flush_kernel_dcache_page' Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Chris Ball <cjb@laptop.org> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Andrew Victor <avictor.za@gmail.com> Cc: Wolfgang Muees <wolfgang.mues@auerswald.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09omap_hsmmc: remove unused local `state'Sergio Aguirre1-1/+0
This fixes the following warning: drivers/mmc/host/omap_hsmmc.c: In function 'omap_hsmmc_suspend': drivers/mmc/host/omap_hsmmc.c:2275: warning: unused variable 'state' Introduced by commit ID: commit 1a13f8fa76c880be41d6b1e6a2b44404bcbfdf9e Author: Matt Fleming <matt@console-pimps.org> Date: Wed May 26 14:42:08 2010 -0700 mmc: remove the "state" argument to mmc_suspend_host() The unique usage of this var was removed there, and missed removing the respective declaration aswell. Signed-off-by: Sergio Aguirre <saaguirre@ti.com> Signed-off-by: Chris Ball <cjb@laptop.org> Acked-by: Matt Fleming <matt@console-pimps.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09ARM: SAMSUNG: MMC: fix build error when both DMA and PIO mode selectedJiri Pinkava1-1/+1
[cjb: fix line-wrapped patch] Signed-off-by: Jiri Pinkava <jiri.pinkava@vscht.cz> Signed-off-by: Chris Ball <cjb@laptop.org> Cc: Matt Fleming <matt@console-pimps.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ben Dooks <ben-linux@fluff.org> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mmc: fix the use of kunmap_atomic() in tmio_mmc.hGuennadi Liakhovetski2-8/+7
kunmap_atomic() takes the cookie, returned by the kmap_atomic() as its argument and not the page address, used as an argument to kmap_atomic(). This patch fixes the compile error: In file included from drivers/mmc/host/tmio_mmc.c:37: drivers/mmc/host/tmio_mmc.h: In function 'tmio_mmc_kunmap_atomic': drivers/mmc/host/tmio_mmc.h:192: error: negative width in bit-field '<anonymous>' Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Eric Miao <eric.y.miao@gmail.com> Tested-by: Magnus Damm <damm@opensource.se> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09tmio_mmc: don't clear unhandled pending interruptsYusuke Goda1-4/+1
Previously, it was possible for ack_mmc_irqs() to clear pending interrupt bits in the CTL_STATUS register, even though the interrupt handler had not been called. This was because of a race that existed when doing a read-modify-write sequence on CTL_STATUS. After the read step in this sequence, if an interrupt occurred (causing one of the bits in CTL_STATUS to be set) the write step would inadvertently clear it. Observed with the TMIO_STAT_RXRDY bit together with CMD53 on AR6002 and BCM4318 SDIO cards in polled mode. This patch eliminates this race by only writing to CTL_STATUS and clearing the interrupts that were passed as an argument to ack_mmc_irqs()." [matt@console-pimps.org: rewrote changelog] Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com> Acked-by: Magnus Damm <damm@opensource.se>" Tested-by: Arnd Hannemann <arnd@arndnet.de>" Acked-by: Ian Molton <ian@mnementh.co.uk> Cc: Matt Fleming <matt@console-pimps.org> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: <linux-mmc@vger.kernel.org> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09cgroups: fix API thinkoMichael S. Tsirkin2-7/+18
Add cgroup_attach_task_all() The existing cgroup_attach_task_current_cg() API is called by a thread to attach another thread to all of its cgroups; this is unsuitable for cases where a privileged task wants to attach itself to the cgroups of a less privileged one, since the call must be made from the context of the target task. This patch adds a more generic cgroup_attach_task_all() API that allows both the source task and to-be-moved task to be specified. cgroup_attach_task_current_cg() becomes a specialization of the more generic new function. [menage@google.com: rewrote changelog] [akpm@linux-foundation.org: address reviewer comments] Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Tested-by: Alex Williamson <alex.williamson@redhat.com> Acked-by: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Ben Blum <bblum@google.com> Cc: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09proc: export uncached bit properly in /proc/kpageflagsTakashi Iwai1-1/+1
Fix the left-over old ifdef for PG_uncached in /proc/kpageflags. Now it's used by x86, too. Signed-off-by: Takashi Iwai <tiwai@suse.de> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09gcov: fix null-pointer dereference for certain module typesPeter Oberparleiter1-64/+180
The gcov-kernel infrastructure expects that each object file is loaded only once. This may not be true, e.g. when loading multiple kernel modules which are linked to the same object file. As a result, loading such kernel modules will result in incorrect gcov results while unloading will cause a null-pointer dereference. This patch fixes these problems by changing the gcov-kernel infrastructure so that multiple profiling data sets can be associated with one debugfs entry. It applies to 2.6.36-rc1. Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Reported-by: Werner Spies <werner.spies@thalesgroup.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09MAINTAINERS: kexec-tools has movedSimon Horman1-1/+1
Kexec tools has been moved to http://kernel.org/pub/linux/utils/kernel/kexec/ as user-space code shouldn't be in /pub/linux/kernel Signed-off-by: Simon Horman <horms@verge.net.au> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09O_DIRECT: fix the splitting up of contiguous I/OJeff Moyer1-2/+2
commit c2c6ca4 (direct-io: do not merge logically non-contiguous requests) introduced a bug whereby all O_DIRECT I/Os were submitted a page at a time to the block layer. The problem is that the code expected dio->block_in_file to correspond to the current page in the dio. In fact, it corresponds to the previous page submitted via submit_page_section. This was purely an oversight, as the dio->cur_page_fs_offset field was introduced for just this purpose. This patch simply uses the correct variable when calculating whether there is a mismatch between contiguous logical blocks and contiguous physical blocks (as described in the comments). I also switched the if conditional following this check to an else if, to ensure that we never call dio_bio_submit twice for the same dio (in theory, this should not happen, anyway). I've tested this by running blktrace and verifying that a 64KB I/O was submitted as a single I/O. I also ran the patched kernel through xfstests' aio tests using xfs, ext4 (with 1k and 4k block sizes) and btrfs and verified that there were no regressions as compared to an unpatched kernel. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Acked-by: Josef Bacik <jbacik@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Chris Mason <chris.mason@oracle.com> Cc: <stable@kernel.org> [2.6.35.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09hp_accel: add quirks for HP ProBook 532x and HP Mini 5102Takashi Iwai1-0/+2
Added missing axis-mapping for HP ProBook 532x and HP Mini 5102. Signed-off-by: Takashi Iwai <tiwai@suse.de> Cc: Eric Piel <eric.piel@tremplin-utc.net> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09MAINTAINERS: remove drivers/char/hpet.cJiri Slaby1-5/+0
bob.picco@hp.com doesn't work any more and Bob says that he's unlikely to work on hpet.c in the future. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Bob Picco <bpicco@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09rtc-bfin: fix state restoration when resumingMike Frysinger1-2/+11
Much (but not all) of the RTC state is kept in the RTC peripheral which has its own power domain. Periodically (1 HZ), that state is synced from one power domain to the other (peripheral->core). When we are resuming, we need to wait for the sync to occur so that we don't get a mismatch of reading undefined state in the rest of the driver. Further, once the externally maintained bits have been synced back into the core, we then need to restore the bits maintained in the core. In our particular case, that is just the write completion interrupt bit. If we don't do any of this, working with the RTC causes ~5 second delays from time to time after waking up due to the write completion interrupt never firing. Reported-by: Michael Dean <mdean@aeronix.com> Reported-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09rtc-bfin: fix inverted logic in suspend pathMike Frysinger1-1/+1
The int_clear helper takes a bitmask of interrupts to keep, not to disable. When suspending without wakeup enabled, we want to disable all interrupts, so use 0 (keep none) instead of -1 (keep all). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09kfifo: add parenthesis for macro parameter referenceHuang Ying1-29/+29
Some macro parameter references inside typeof() operator are not enclosed with parenthesis. It should be safer to add them. Signed-off-by: Huang Ying <ying.huang@intel.com> Acked-by: Stefani Seibold <stefani@seibold.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09mmc: avoid getting CID on SDIO-only cardsDavid Vrabel2-3/+4
The introduction of support for SD combo cards breaks the initialization of all CSR SDIO chips. The GO_IDLE (CMD0) in mmc_sd_get_cid() causes CSR chips to be reset (this is non-standard behavior). When initializing an SDIO card check for a combo card by using the memory present bit in the R4 response to IO_SEND_OP_COND (CMD5). This avoids the call to mmc_sd_get_cid() on an SDIO-only card. Signed-off-by: David Vrabel <david.vrabel@csr.com> Acked-by: Michal Mirolaw <mirq-linux@rere.qmqm.pl> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-09Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds33-175/+427
* master.kernel.org:/home/rmk/linux-2.6-arm: (30 commits) ARM: Update mach-types ARM: Partially revert "Auto calculate ZRELADDR and provide option for exceptions" ARM: Ensure PTE modifications via dma_alloc_coherent are visible ARM: 6359/1: ep93xx: move clock initialization earlier Revert "[ARM] pxa: remove now unnecessary dma_needs_bounce()" ARM: 6352/1: perf: fix event validation ARM: 6344/1: Mark CPU_32v6K as depended on CPU_V7 ARM: 6343/1: wire up fanotify and prlimit64 syscalls on ARM ARM: 6330/1: perf: reword comments relating to perf_event_do_pending ARM: pxa168fb: fix section mismatch ARM: pxa: Make id const in pwm_probe() ARM: pxa: fix CI_HSYNC and CI_VSYNC MFP defines for pxa300 ARM: pxa: remove __init from cpufreq_driver->init() ARM: imx: set cache line size to 64 bytes for i.MX5 mx5/clock: fix clear bit fields issue in _clk_ccgr_disable function mxc/tzic: add base address when accessing TZIC registers ARM: mach-shmobile: ap4evb: fix write protect for SDHI1 ARM: mach-shmobile: ap4evb: modify FSI2 ID ARM: mach-shmobile: do not enable the PLLC2 clock on init ARM: mach-shmobile: Clock framework comment fix ...
2010-09-09[IA64] fix siglockTony Luck1-7/+39
When ia64 converted to using ticket locks, an inline implementation of trylock/unlock in fsys.S was missed. This was not noticed because in most circumstances it simply resulted in using the slow path because the siglock was apparently not available (under old spinlock rules). Problems occur when the ticket spinlock has value 0x0 (when first initialised, or when it wraps around). At this point the fsys.S code acquires the lock (changing the 0x0 to 0x1. If another process attempts to get the lock at this point, it will change the value from 0x1 to 0x2 (using new ticket lock rules). Then the fsys.S code will free the lock using old spinlock rules by writing 0x0 to it. From here a variety of bad things can happen. Signed-off-by: Tony Luck <tony.luck@intel.com>
2010-09-09sctp: fix test for end of loopJoe Perches1-23/+23
Add a list_has_sctp_addr function to simplify loop Based on a patches by Dan Carpenter and David Miller Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-09ARM: Update mach-typesRussell King1-2/+96
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-09ARM: Partially revert "Auto calculate ZRELADDR and provide option for ↵Russell King4-95/+10
exceptions" Partially revert e69edc7, which introduced automatic zreladdr support. The change in the way the manual definition is defined seems to be error and conflict prone. Go back to the original way we were handling this for the time being, while keeping the automatic zreladdr facility. Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-09-09Merge branch 'origin'Russell King167-1076/+1693
2010-09-09perf symbols: Fix multiple initialization of symbol systemJovi Zhang2-1/+9
By returning immediately if it was already initialized, do it as well at symbol__exit, refusing multiple deinitializations. This fixes problems in the kmem, sched and timechart commands. Reported-by: Davidlohr Bueso <dave@gnu.org> Cc: Davidlohr Bueso <dave@gnu.org> Signed-off-by: Jovi Zhang <bookjovi@gmail.com> LKML-Reference: AANLkTi=9Cn=R8SPMCRp5z+gEjXbaBHeb-AaOtRbuwwcn@mail.gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-09-09irq: Fix circular headers dependencyFrederic Weisbecker1-1/+1
asm-generic/hardirq.h needs asm/irq.h which might include linux/interrupt.h as in the sparc 32 case. At this point we need irq_cpustat generic definitions, but those are included later in asm-generic/hardirq.h. Then delay a bit the inclusion of irq.h from asm-generic/hardirq.h, it doesn't need to be included early. This fixes: include/linux/interrupt.h: In function '__raise_softirq_irqoff': include/linux/interrupt.h:414: error: implicit declaration of function 'local_softirq_pending' include/linux/interrupt.h:414: error: lvalue required as left operand of assignment Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Koki Sanagi <sanagi.koki@jp.fujitsu.com> Cc: mathieu.desnoyers@efficios.com Cc: rostedt@goodmis.org Cc: nhorman@tuxdriver.com Cc: scott.a.mcmillan@intel.com Cc: eric.dumazet@gmail.com Cc: kaneshige.kenji@jp.fujitsu.com Cc: davem@davemloft.net Cc: izumi.taku@jp.fujitsu.com Cc: kosaki.motohiro@jp.fujitsu.com LKML-Reference: <20100908122557.GA5310@nowhere> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Fix up delayed_put_task_struct()Peter Zijlstra3-3/+11
I missed a perf_event_ctxp user when converting it to an array. Pull this last user into perf_event.c as well and fix it up. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Optimize context opsPeter Zijlstra1-0/+6
Assuming we don't mix events of different pmus onto a single context (with the exeption of software events inside a hardware group) we can now assume that all events on a particular context belong to the same pmu, hence we can disable the pmu for the entire context operations. This reduces the amount of hardware writes. The exception for swevents comes from the fact that the sw pmu disable is a nop. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Provide a separate task context for sweventsPeter Zijlstra4-19/+33
Since software events are always schedulable, mixing them up with hardware events (who are not) can lead to funny scheduling oddities. Giving them their own context solves this. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Multiple task contextsPeter Zijlstra3-106/+239
Provide the infrastructure for multiple task contexts. A more flexible approach would have resulted in more pointer chases in the scheduling hot-paths. This approach has the limitation of a static number of task contexts. Since I expect most external PMUs to be system wide, or at least node wide (as per the intel uncore unit) they won't actually need a task context. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Clean up perf_event_context allocationPeter Zijlstra1-15/+26
Unify the two perf_event_context allocation sites. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Move some code aroundPeter Zijlstra1-100/+100
Move all inherit code near each other. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Per-pmu-per-cpu contextsPeter Zijlstra2-69/+113
Allocate per-cpu contexts per pmu. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Per cpu-context rotation timerPeter Zijlstra3-22/+65
Give each cpu-context its own timer so that it is a self contained entity, this eases the way for per-pmu-per-cpu contexts as well as provides the basic infrastructure to allow different rotation times per pmu. Things to look at: - folding the tick and these TICK_NSEC timers - separate task context rotation Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Remove the swevent hash-table from the cpu contextPeter Zijlstra2-52/+58
Separate the swevent hash-table from the cpu_context bits in preparation for per pmu cpu contexts. This keeps the swevent hash a global entity. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Separate find_get_context() from event initializationPeter Zijlstra1-38/+35
Separate find_get_context() from the event allocation and initialization so that we may make find_get_context() depend on the event pmu in a later patch. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Remove the sysfs bitsPeter Zijlstra6-147/+5
Neither the overcommit nor the reservation sysfs parameter were actually working, remove them as they'll only get in the way. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Rework the PMU methodsPeter Zijlstra14-331/+576
Replace pmu::{enable,disable,start,stop,unthrottle} with pmu::{add,del,start,stop}, all of which take a flags argument. The new interface extends the capability to stop a counter while keeping it scheduled on the PMU. We replace the throttled state with the generic stopped state. This also allows us to efficiently stop/start counters over certain code paths (like IRQ handlers). It also allows scheduling a counter without it starting, allowing for a generic frozen state (useful for rotating stopped counters). The stopped state is implemented in two different ways, depending on how the architecture implemented the throttled state: 1) We disable the counter: a) the pmu has per-counter enable bits, we flip that b) we program a NOP event, preserving the counter state 2) We store the counter state and ignore all read/overflow events Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Shrink hw_perf_eventPeter Zijlstra2-8/+6
Use hw_perf_event::period_left instead of hw_perf_event::remaining and win back 8 bytes. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Default PMU opsPeter Zijlstra2-17/+57
Provide default implementations for the pmu txn methods, this allows us to remove some conditional code. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Per PMU disablePeter Zijlstra9-99/+119
Changes perf_disable() into perf_pmu_disable(). Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Reduce perf_disable() usagePeter Zijlstra8-59/+48
Since the current perf_disable() usage is only an optimization, remove it for now. This eases the removal of the __weak hw_perf_enable() interface. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Unindent labelsPeter Zijlstra1-19/+24
Fixup random annoying style bits. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Register PMU implementationsPeter Zijlstra10-412/+488
Simple registration interface for struct pmu, this provides the infrastructure for removing all the weak functions. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09perf: Deconstify struct pmuPeter Zijlstra9-40/+40
sed -ie 's/const struct pmu\>/struct pmu/g' `git grep -l "const struct pmu\>"` Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: paulus <paulus@samba.org> Cc: stephane eranian <eranian@googlemail.com> Cc: Robert Richter <robert.richter@amd.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> Cc: Yanmin <yanmin_zhang@linux.intel.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: David Miller <davem@davemloft.net> Cc: Michael Cree <mcree@orcon.net.nz> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-09Merge branch 'perf/urgent' into perf/coreIngo Molnar13-88/+194
Merge reason: Pick up pending fixes before applying dependent new changes. Signed-off-by: Ingo Molnar <mingo@elte.hu>