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| author | Paul Mundt <lethal@linux-sh.org> | 2010-10-12 22:46:25 +0400 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-10-27 11:51:33 +0400 |
| commit | 2e4f17d230d84579fef07836fb5f69bf1a0a47ad (patch) | |
| tree | 552b861fccfd34c7664f097293ce10014cf6134d /arch/sh/oprofile | |
| parent | 667b279baa529a1b5bd120d4ce3df643a5749263 (diff) | |
| download | linux-2e4f17d230d84579fef07836fb5f69bf1a0a47ad.tar.xz | |
sh: oprofile: Fix up and extend op_name_from_perf_id().
op_name_from_perf_id() currently returns a local variable, which isn't
terribly productive. As we only handle a single PMU case for now, simply
allocate and free the string from the arch init/exit context and have
op_name_from_perf_id() hand back the cached string.
This also takes UTS_MACHINE in to account, given that we build for
multiple architectures.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/oprofile')
| -rw-r--r-- | arch/sh/oprofile/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/oprofile/common.c | 31 |
2 files changed, 19 insertions, 14 deletions
diff --git a/arch/sh/oprofile/Makefile b/arch/sh/oprofile/Makefile index e85aae73e3dc..ce3b119021e7 100644 --- a/arch/sh/oprofile/Makefile +++ b/arch/sh/oprofile/Makefile @@ -1,5 +1,7 @@ obj-$(CONFIG_OPROFILE) += oprofile.o +CFLAGS_common.o += -DUTS_MACHINE='"$(UTS_MACHINE)"' + DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ oprof.o cpu_buffer.o buffer_sync.o \ event_buffer.o oprofile_files.o \ diff --git a/arch/sh/oprofile/common.c b/arch/sh/oprofile/common.c index e10d89376f9b..84533142da9b 100644 --- a/arch/sh/oprofile/common.c +++ b/arch/sh/oprofile/common.c @@ -1,7 +1,7 @@ /* * arch/sh/oprofile/init.c * - * Copyright (C) 2003 - 2008 Paul Mundt + * Copyright (C) 2003 - 2010 Paul Mundt * * Based on arch/mips/oprofile/common.c: * @@ -18,38 +18,41 @@ #include <linux/errno.h> #include <linux/smp.h> #include <linux/perf_event.h> +#include <linux/slab.h> #include <asm/processor.h> #ifdef CONFIG_HW_PERF_EVENTS extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth); +/* + * This will need to be reworked when multiple PMUs are supported. + */ +static char *sh_pmu_op_name; + char *op_name_from_perf_id(void) { - const char *pmu; - char buf[20]; - int size; - - pmu = perf_pmu_name(); - if (!pmu) - return NULL; - - size = snprintf(buf, sizeof(buf), "sh/%s", pmu); - if (size > -1 && size < sizeof(buf)) - return buf; - - return NULL; + return sh_pmu_op_name; } int __init oprofile_arch_init(struct oprofile_operations *ops) { ops->backtrace = sh_backtrace; + if (perf_num_counters() == 0) + return -ENODEV; + + sh_pmu_op_name = kasprintf(GFP_KERNEL, "%s/%s", + UTS_MACHINE, perf_pmu_name()); + if (unlikely(!sh_pmu_op_name)) + return -ENOMEM; + return oprofile_perf_init(ops); } void __exit oprofile_arch_exit(void) { oprofile_perf_exit(); + kfree(sh_pmu_op_name); } #else int __init oprofile_arch_init(struct oprofile_operations *ops) |