kernel.git/arch/powerpc, branch linux-2.6.37.y

perf, powerpc: Handle events that raise an exception without overflowing

2011-03-23T19:50:36Z

commit 0837e3242c73566fc1c0196b4ec61779c25ffc93 upstream. Events on POWER7 can roll back if a speculative event doesn't eventually complete. Unfortunately in some rare cases they will raise a performance monitor exception. We need to catch this to ensure we reset the PMC. In all cases the PMC will be 256 or less cycles from overflow. Signed-off-by: Anton Blanchard Signed-off-by: Peter Zijlstra LKML-Reference: <20110309143842.6c22845e@kryten> Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

powerpc: Fix some 6xx/7xxx CPU setup functions

2011-02-17T23:14:42Z

commit 1f1936ff3febf38d582177ea319eaa278f32c91f upstream. Some of those functions try to adjust the CPU features, for example to remove NAP support on some revisions. However, they seem to use r5 as an index into the CPU table entry, which might have been right a long time ago but no longer is. r4 is the right register to use. This probably caused some off behaviours on some PowerMac variants using 750cx or 7455 processor revisions. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Greg Kroah-Hartman

powerpc/numa: Fix bug in unmap_cpu_from_node

2011-02-17T23:14:41Z

commit 429f4d8d20b91e4a6c239f951c06a56a6ac22957 upstream. When converting to the new cpumask code I screwed up: - if (cpu_isset(cpu, numa_cpumask_lookup_table[node])) { - cpu_clear(cpu, numa_cpumask_lookup_table[node]); + if (cpumask_test_cpu(cpu, node_to_cpumask_map[node])) { + cpumask_set_cpu(cpu, node_to_cpumask_map[node]); This was introduced in commit 25863de07af9 (powerpc/cpumask: Convert NUMA code to new cpumask API) Fix it. Signed-off-by: Anton Blanchard Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Greg Kroah-Hartman

powerpc: Fix hcall tracepoint recursion

2011-02-17T23:14:41Z

commit 57cdfdf829a850a317425ed93c6a576c9ee6329c upstream. Spinlocks on shared processor partitions use H_YIELD to notify the hypervisor we are waiting on another virtual CPU. Unfortunately this means the hcall tracepoints can recurse. The patch below adds a percpu depth and checks it on both the entry and exit hcall tracepoints. Signed-off-by: Anton Blanchard Acked-by: Steven Rostedt Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Greg Kroah-Hartman

powerpc/85xx: fix compatible properties of the P1022DS DMA nodes used for audio

2011-02-17T23:14:41Z

commit b2e0861e51f2961954330dcafe6d148ee3ab5cff upstream. In order to prevent the fsl_dma driver from claiming the DMA channels that the P1022DS audio driver needs, the compatible properties for those nodes must say "fsl,ssi-dma-channel" instead of "fsl,eloplus-dma-channel". Signed-off-by: Timur Tabi Signed-off-by: Kumar Gala Signed-off-by: Greg Kroah-Hartman

rapidio: fix hang on RapidIO doorbell queue full condition

2011-02-17T23:14:22Z

commit 12a4dc43911785f51a596f771ae0701b18d436f1 upstream. In fsl_rio_dbell_handler() the code currently simply acknowledges the QFI queue full interrupt, but does nothing to resolve the queue full condition. Instead, it jumps to the end of the isr. When a queue full condition occurs, the isr is then re-entered immediately and continually, forever. The fix is to just fall through and read out current doorbell entries. Signed-off-by: Thomas Taranowski Cc: Alexandre Bounine Cc: Kumar Gala Cc: Matt Porter Cc: Li Yang Cc: Thomas Moll Cc: Micha Nelissen Cc: Benjamin Herrenschmidt Cc: Grant Likely Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

powerpc/mpc5200: include fs.h in mpc52xx_gpt.c

2010-12-23T19:08:02Z

Fix build errors like these (from a randconfig and my defconfig for a custom board): src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:549: error: dereferencing pointer to incomplete type: 1 errors in 1 logs src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:636: error: implicit declaration of function 'nonseekable_open': 1 errors in 1 logs src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:657: error: variable 'mpc52xx_wdt_fops' has initializer but incomplete type: 1 errors in 1 logs src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: excess elements in struct initializer: 1 errors in 1 logs src/arch/powerpc/platforms/52xx/mpc52xx_gpt.c:658: error: unknown field 'owner' specified in initializer: 1 errors in 1 logs ... Reported-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang Cc: Grant Likely Cc: Benjamin Herrenschmidt Cc: Andrew Morton Signed-off-by: Grant Likely

powerpc: Use call_rcu_sched() for pagetables

2010-11-29T23:42:20Z

PowerPC relies on IRQ-disable to guard against RCU quiecent states, use the appropriate RCU call version. Signed-off-by: Peter Zijlstra Signed-off-by: Benjamin Herrenschmidt

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb

2010-11-18T16:24:58Z

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb,ppc: Fix regression in evr register handling kgdb,x86: fix regression in detach handling kdb: fix crash when KDB_BASE_CMD_MAX is exceeded kdb: fix memory leak in kdb_main.c

powerpc: Update a BKL related comment

2010-11-18T03:54:24Z

The commit 5e3d20a remove bkl from startup code so setup_arch() it isn't called with bkl held anymore. Update the comment on top of that function. Fix also a typo. This work was supported by a hardware donation from the CE Linux Forum. Signed-off-by: Alessio Igor Bogani Signed-off-by: Benjamin Herrenschmidt