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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 02:33:34 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 02:33:34 +0100 |
| commit | 7d91de74436a69c2b78a7a72f1e7f97f8b4396fa (patch) | |
| tree | a43e68ae4ebbf0ec98678876d584fb0eb0303274 /kernel/panic.c | |
| parent | Merge tag 'modules-for-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| parent | printk: drop call_console_drivers() unused param (diff) | |
| download | linux-7d91de74436a69c2b78a7a72f1e7f97f8b4396fa.tar.xz linux-7d91de74436a69c2b78a7a72f1e7f97f8b4396fa.zip | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk
Pull printk updates from Petr Mladek:
- Add Petr Mladek, Sergey Senozhatsky as printk maintainers, and Steven
Rostedt as the printk reviewer. This idea came up after the
discussion about printk issues at Kernel Summit. It was formulated
and discussed at lkml[1].
- Extend a lock-less NMI per-cpu buffers idea to handle recursive
printk() calls by Sergey Senozhatsky[2]. It is the first step in
sanitizing printk as discussed at Kernel Summit.
The change allows to see messages that would normally get ignored or
would cause a deadlock.
Also it allows to enable lockdep in printk(). This already paid off.
The testing in linux-next helped to discover two old problems that
were hidden before[3][4].
- Remove unused parameter by Sergey Senozhatsky. Clean up after a past
change.
[1] http://lkml.kernel.org/r/1481798878-31898-1-git-send-email-pmladek@suse.com
[2] http://lkml.kernel.org/r/20161227141611.940-1-sergey.senozhatsky@gmail.com
[3] http://lkml.kernel.org/r/20170215044332.30449-1-sergey.senozhatsky@gmail.com
[4] http://lkml.kernel.org/r/20170217015932.11898-1-sergey.senozhatsky@gmail.com
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk:
printk: drop call_console_drivers() unused param
printk: convert the rest to printk-safe
printk: remove zap_locks() function
printk: use printk_safe buffers in printk
printk: report lost messages in printk safe/nmi contexts
printk: always use deferred printk when flush printk_safe lines
printk: introduce per-cpu safe_print seq buffer
printk: rename nmi.c and exported api
printk: use vprintk_func in vprintk()
MAINTAINERS: Add printk maintainers
Diffstat (limited to 'kernel/panic.c')
| -rw-r--r-- | kernel/panic.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index 08aa88dde7de..b95959733ce0 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -188,7 +188,7 @@ void panic(const char *fmt, ...) * Bypass the panic_cpu check and call __crash_kexec directly. */ if (!_crash_kexec_post_notifiers) { - printk_nmi_flush_on_panic(); + printk_safe_flush_on_panic(); __crash_kexec(NULL); /* @@ -213,7 +213,7 @@ void panic(const char *fmt, ...) atomic_notifier_call_chain(&panic_notifier_list, 0, buf); /* Call flush even twice. It tries harder with a single online CPU */ - printk_nmi_flush_on_panic(); + printk_safe_flush_on_panic(); kmsg_dump(KMSG_DUMP_PANIC); /* |