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| author | Olof Johansson <olof@lixom.net> | 2011-12-16 07:02:34 +0100 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2011-12-16 07:02:34 +0100 |
| commit | 02735a29d8ce882ec698803f064e17888874780c (patch) | |
| tree | 6a4afa3bc8b6d4334df24910a56f77adf126b0c7 /drivers/oprofile/oprof.c | |
| parent | Merge branches 'at91/gpio', 'at91/ioremap', 'drivers/macb-gem-cleanup' and 'm... (diff) | |
| parent | Merge branch 'for-arnd-3.3-defconfig' of git://github.com/at91linux/linux-at9... (diff) | |
| download | linux-02735a29d8ce882ec698803f064e17888874780c.tar.xz linux-02735a29d8ce882ec698803f064e17888874780c.zip | |
Merge branch 'at91/defconfig' into next/cleanup
Diffstat (limited to 'drivers/oprofile/oprof.c')
| -rw-r--r-- | drivers/oprofile/oprof.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/oprofile/oprof.c b/drivers/oprofile/oprof.c index dccd8636095c..f8c752e408a6 100644 --- a/drivers/oprofile/oprof.c +++ b/drivers/oprofile/oprof.c @@ -239,26 +239,45 @@ int oprofile_set_ulong(unsigned long *addr, unsigned long val) return err; } +static int timer_mode; + static int __init oprofile_init(void) { int err; + /* always init architecture to setup backtrace support */ err = oprofile_arch_init(&oprofile_ops); - if (err < 0 || timer) { - printk(KERN_INFO "oprofile: using timer interrupt.\n"); + + timer_mode = err || timer; /* fall back to timer mode on errors */ + if (timer_mode) { + if (!err) + oprofile_arch_exit(); err = oprofile_timer_init(&oprofile_ops); if (err) return err; } - return oprofilefs_register(); + + err = oprofilefs_register(); + if (!err) + return 0; + + /* failed */ + if (timer_mode) + oprofile_timer_exit(); + else + oprofile_arch_exit(); + + return err; } static void __exit oprofile_exit(void) { - oprofile_timer_exit(); oprofilefs_unregister(); - oprofile_arch_exit(); + if (timer_mode) + oprofile_timer_exit(); + else + oprofile_arch_exit(); } |