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Merge tag 'for-v3.7' of git://git.infradead.org/users/cbou/linux-pstore

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Pull pstore changes from Anton Vorontsov:

 1) We no longer ad-hoc to the function tracer "high level"
    infrastructure and no longer use its debugfs knobs.  The change
    slightly touches kernel/trace directory, but it got the needed ack
    from Steven Rostedt:

      http://lkml.org/lkml/2012/8/21/688

 2) Added maintainers entry;

 3) A bunch of fixes, nothing special.

* tag 'for-v3.7' of git://git.infradead.org/users/cbou/linux-pstore:
  pstore: Avoid recursive spinlocks in the oops_in_progress case
  pstore/ftrace: Convert to its own enable/disable debugfs knob
  pstore/ram: Add missing platform_device_unregister
  MAINTAINERS: Add pstore maintainers
  pstore/ram: Mark ramoops_pstore_write_buf() as notrace
  pstore/ram: Fix printk format warning
  pstore/ram: Fix possible NULL dereference
This commit is contained in:
Linus Torvalds
2012-10-07 17:30:50 +09:00
parent e665faa424 80c9d03c22
commit 7f60ba388f
9 changed files with 139 additions and 40 deletions
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15
kernel/trace/trace_functions.c
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@ -13,7 +13,6 @@
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/ftrace.h>
#include <linux/pstore.h>
#include <linux/fs.h>
#include "trace.h"
@ -76,10 +75,9 @@ function_trace_call_preempt_only(unsigned long ip, unsigned long parent_ip,
preempt_enable_notrace();
}
/* Our two options */
/* Our option */
enum {
TRACE_FUNC_OPT_STACK = 0x1,
TRACE_FUNC_OPT_PSTORE = 0x2,
};
static struct tracer_flags func_flags;
@ -109,12 +107,6 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
/*
* So far tracing doesn't support multiple buffers, so
* we make an explicit call for now.
*/
if (unlikely(func_flags.val & TRACE_FUNC_OPT_PSTORE))
pstore_ftrace_call(ip, parent_ip);
pc = preempt_count();
trace_function(tr, ip, parent_ip, flags, pc);
}
@ -180,9 +172,6 @@ static struct ftrace_ops trace_stack_ops __read_mostly =
static struct tracer_opt func_opts[] = {
#ifdef CONFIG_STACKTRACE
{ TRACER_OPT(func_stack_trace, TRACE_FUNC_OPT_STACK) },
#endif
#ifdef CONFIG_PSTORE_FTRACE
{ TRACER_OPT(func_pstore, TRACE_FUNC_OPT_PSTORE) },
#endif
{ } /* Always set a last empty entry */
};
@ -235,8 +224,6 @@ static int func_set_flag(u32 old_flags, u32 bit, int set)
register_ftrace_function(&trace_ops);
}
break;
case TRACE_FUNC_OPT_PSTORE:
break;
default:
return -EINVAL;