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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:56:17 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:56:17 -0800 |
commit | fa7f578076a8814caa5371e9f4949e408140766d (patch) | |
tree | 8021be6f956e8a259523c394a01183797ce04422 /kernel/panic.c | |
parent | Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (diff) | |
parent | EXPERT Kconfig menu: fix broken EXPERT menu (diff) | |
download | linux-dev-fa7f578076a8814caa5371e9f4949e408140766d.tar.xz linux-dev-fa7f578076a8814caa5371e9f4949e408140766d.zip |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
- a bit more MM
- procfs updates
- dynamic-debug fixes
- lib/ updates
- checkpatch
- epoll
- nilfs2
- signals
- rapidio
- PID management cleanup and optimization
- kcov updates
- sysvipc updates
- quite a few misc things all over the place
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (94 commits)
EXPERT Kconfig menu: fix broken EXPERT menu
include/asm-generic/topology.h: remove unused parent_node() macro
arch/tile/include/asm/topology.h: remove unused parent_node() macro
arch/sparc/include/asm/topology_64.h: remove unused parent_node() macro
arch/sh/include/asm/topology.h: remove unused parent_node() macro
arch/ia64/include/asm/topology.h: remove unused parent_node() macro
drivers/pcmcia/sa1111_badge4.c: avoid unused function warning
mm: add infrastructure for get_user_pages_fast() benchmarking
sysvipc: make get_maxid O(1) again
sysvipc: properly name ipc_addid() limit parameter
sysvipc: duplicate lock comments wrt ipc_addid()
sysvipc: unteach ids->next_id for !CHECKPOINT_RESTORE
initramfs: use time64_t timestamps
drivers/watchdog: make use of devm_register_reboot_notifier()
kernel/reboot.c: add devm_register_reboot_notifier()
kcov: update documentation
Makefile: support flag -fsanitizer-coverage=trace-cmp
kcov: support comparison operands collection
kcov: remove pointless current != NULL check
kernel/panic.c: add TAINT_AUX
...
Diffstat (limited to 'kernel/panic.c')
-rw-r--r-- | kernel/panic.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index bdd18afa19a4..2cfef408fec9 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -27,6 +27,8 @@ #include <linux/console.h> #include <linux/bug.h> #include <linux/ratelimit.h> +#include <linux/debugfs.h> +#include <asm/sections.h> #define PANIC_TIMER_STEP 100 #define PANIC_BLINK_SPD 18 @@ -322,6 +324,7 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = { { 'E', ' ', true }, /* TAINT_UNSIGNED_MODULE */ { 'L', ' ', false }, /* TAINT_SOFTLOCKUP */ { 'K', ' ', true }, /* TAINT_LIVEPATCH */ + { 'X', ' ', true }, /* TAINT_AUX */ }; /** @@ -343,6 +346,7 @@ const struct taint_flag taint_flags[TAINT_FLAGS_COUNT] = { * 'E' - Unsigned module has been loaded. * 'L' - A soft lockup has previously occurred. * 'K' - Kernel has been live patched. + * 'X' - Auxiliary taint, for distros' use. * * The string is overwritten by the next call to print_tainted(). */ @@ -518,7 +522,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint, { disable_trace_on_warning(); - pr_warn("------------[ cut here ]------------\n"); + if (args) + pr_warn(CUT_HERE); if (file) pr_warn("WARNING: CPU: %d PID: %d at %s:%d %pS\n", @@ -582,9 +587,49 @@ EXPORT_SYMBOL(warn_slowpath_fmt_taint); void warn_slowpath_null(const char *file, int line) { + pr_warn(CUT_HERE); __warn(file, line, __builtin_return_address(0), TAINT_WARN, NULL, NULL); } EXPORT_SYMBOL(warn_slowpath_null); +#else +void __warn_printk(const char *fmt, ...) +{ + va_list args; + + pr_warn(CUT_HERE); + + va_start(args, fmt); + vprintk(fmt, args); + va_end(args); +} +EXPORT_SYMBOL(__warn_printk); +#endif + +#ifdef CONFIG_BUG + +/* Support resetting WARN*_ONCE state */ + +static int clear_warn_once_set(void *data, u64 val) +{ + generic_bug_clear_once(); + memset(__start_once, 0, __end_once - __start_once); + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(clear_warn_once_fops, + NULL, + clear_warn_once_set, + "%lld\n"); + +static __init int register_warn_debugfs(void) +{ + /* Don't care about failure */ + debugfs_create_file("clear_warn_once", 0200, NULL, + NULL, &clear_warn_once_fops); + return 0; +} + +device_initcall(register_warn_debugfs); #endif #ifdef CONFIG_CC_STACKPROTECTOR |