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Improvements and fixes to pstore subsystem:

Browse source 
- 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
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 Version: GnuPG v1
 Comment: Kees Cook <kees@outflux.net>
 
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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
This commit is contained in:
Linus Torvalds 2016-12-13 09:16:11 -08:00
commit 52281b38bc
11 changed files with 404 additions and 127 deletions
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17
kernel/trace/ftrace.c
View file

@ -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)