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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 09:16:11 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-13 09:16:11 -0800 |
| commit | 52281b38bc28e188a8aad17c3bf200e670a37aba (patch) | |
| tree | 00dd517406337ffe33834a743e78860d36c14457 /kernel | |
| parent | daf34710a9e8849e04867d206692dc42d6d22263 (diff) | |
| parent | fc46d4e453f50d2b376267f180cae250b54f9fb4 (diff) | |
Merge tag 'pstore-v4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore updates from Kees Cook:
"Improvements and fixes to pstore subsystem:
- add additional checks for bad platform data
- remove bounce buffer in console writer
- protect read/unlink race with a mutex
- correctly give up during dump locking failures
- increase ftrace bandwidth by splitting ftrace buffers per CPU"
* tag 'pstore-v4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
ramoops: add pdata NULL check to ramoops_probe
pstore: Convert console write to use ->write_buf
pstore: Protect unlink with read_mutex
pstore: Use global ftrace filters for function trace filtering
ftrace: Provide API to use global filtering for ftrace ops
pstore: Clarify context field przs as dprzs
pstore: improve error report for failed setup
pstore: Merge per-CPU ftrace records into one
pstore: Add ftrace timestamp counter
ramoops: Split ftrace buffer space into per-CPU zones
pstore: Make ramoops_init_przs generic for other prz arrays
pstore: Allow prz to control need for locking
pstore: Warn on PSTORE_TYPE_PMSG using deprecated function
pstore: Make spinlock per zone instead of global
pstore: Actually give up during locking failure
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/ftrace.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index da87b3cba5b3..33dd57f53f88 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -4258,6 +4258,23 @@ int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip, } EXPORT_SYMBOL_GPL(ftrace_set_filter_ip); +/** + * ftrace_ops_set_global_filter - setup ops to use global filters + * @ops - the ops which will use the global filters + * + * ftrace users who need global function trace filtering should call this. + * It can set the global filter only if ops were not initialized before. + */ +void ftrace_ops_set_global_filter(struct ftrace_ops *ops) +{ + if (ops->flags & FTRACE_OPS_FL_INITIALIZED) + return; + + ftrace_ops_init(ops); + ops->func_hash = &global_ops.local_hash; +} +EXPORT_SYMBOL_GPL(ftrace_ops_set_global_filter); + static int ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len, int reset, int enable) |