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-rw-r--r--kernel/panic.c84
1 files changed, 52 insertions, 32 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 12c5a0a6c89..6513aac8e99 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -23,7 +23,7 @@
#include <linux/kallsyms.h>
int panic_on_oops;
-int tainted;
+static unsigned long tainted_mask;
static int pause_on_oops;
static int pause_on_oops_flag;
static DEFINE_SPINLOCK(pause_on_oops_lock);
@@ -34,13 +34,6 @@ ATOMIC_NOTIFIER_HEAD(panic_notifier_list);
EXPORT_SYMBOL(panic_notifier_list);
-static int __init panic_setup(char *str)
-{
- panic_timeout = simple_strtoul(str, NULL, 0);
- return 1;
-}
-__setup("panic=", panic_setup);
-
static long no_blink(long time)
{
return 0;
@@ -143,6 +136,27 @@ NORET_TYPE void panic(const char * fmt, ...)
EXPORT_SYMBOL(panic);
+
+struct tnt {
+ u8 bit;
+ char true;
+ char false;
+};
+
+static const struct tnt tnts[] = {
+ { TAINT_PROPRIETARY_MODULE, 'P', 'G' },
+ { TAINT_FORCED_MODULE, 'F', ' ' },
+ { TAINT_UNSAFE_SMP, 'S', ' ' },
+ { TAINT_FORCED_RMMOD, 'R', ' ' },
+ { TAINT_MACHINE_CHECK, 'M', ' ' },
+ { TAINT_BAD_PAGE, 'B', ' ' },
+ { TAINT_USER, 'U', ' ' },
+ { TAINT_DIE, 'D', ' ' },
+ { TAINT_OVERRIDDEN_ACPI_TABLE, 'A', ' ' },
+ { TAINT_WARN, 'W', ' ' },
+ { TAINT_CRAP, 'C', ' ' },
+};
+
/**
* print_tainted - return a string to represent the kernel taint state.
*
@@ -155,44 +169,47 @@ EXPORT_SYMBOL(panic);
* 'U' - Userspace-defined naughtiness.
* 'A' - ACPI table overridden.
* 'W' - Taint on warning.
+ * 'C' - modules from drivers/staging are loaded.
*
* The string is overwritten by the next call to print_taint().
*/
-
const char *print_tainted(void)
{
- static char buf[20];
- if (tainted) {
- snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c%c%c%c%c",
- tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G',
- tainted & TAINT_FORCED_MODULE ? 'F' : ' ',
- tainted & TAINT_UNSAFE_SMP ? 'S' : ' ',
- tainted & TAINT_FORCED_RMMOD ? 'R' : ' ',
- tainted & TAINT_MACHINE_CHECK ? 'M' : ' ',
- tainted & TAINT_BAD_PAGE ? 'B' : ' ',
- tainted & TAINT_USER ? 'U' : ' ',
- tainted & TAINT_DIE ? 'D' : ' ',
- tainted & TAINT_OVERRIDDEN_ACPI_TABLE ? 'A' : ' ',
- tainted & TAINT_WARN ? 'W' : ' ');
- }
- else
+ static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ") + 1];
+
+ if (tainted_mask) {
+ char *s;
+ int i;
+
+ s = buf + sprintf(buf, "Tainted: ");
+ for (i = 0; i < ARRAY_SIZE(tnts); i++) {
+ const struct tnt *t = &tnts[i];
+ *s++ = test_bit(t->bit, &tainted_mask) ?
+ t->true : t->false;
+ }
+ *s = 0;
+ } else
snprintf(buf, sizeof(buf), "Not tainted");
return(buf);
}
-void add_taint(unsigned flag)
+int test_taint(unsigned flag)
{
- debug_locks = 0; /* can't trust the integrity of the kernel anymore */
- tainted |= flag;
+ return test_bit(flag, &tainted_mask);
+}
+EXPORT_SYMBOL(test_taint);
+
+unsigned long get_taint(void)
+{
+ return tainted_mask;
}
-EXPORT_SYMBOL(add_taint);
-static int __init pause_on_oops_setup(char *str)
+void add_taint(unsigned flag)
{
- pause_on_oops = simple_strtoul(str, NULL, 0);
- return 1;
+ debug_locks = 0; /* can't trust the integrity of the kernel anymore */
+ set_bit(flag, &tainted_mask);
}
-__setup("pause_on_oops=", pause_on_oops_setup);
+EXPORT_SYMBOL(add_taint);
static void spin_msec(int msecs)
{
@@ -353,3 +370,6 @@ void __stack_chk_fail(void)
}
EXPORT_SYMBOL(__stack_chk_fail);
#endif
+
+core_param(panic, panic_timeout, int, 0644);
+core_param(pause_on_oops, pause_on_oops, int, 0644);