diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 38 | ||||
| -rw-r--r-- | lib/debug_locks.c | 2 | ||||
| -rw-r--r-- | lib/decompress_bunzip2.c | 1 | ||||
| -rw-r--r-- | lib/decompress_inflate.c | 1 | ||||
| -rw-r--r-- | lib/decompress_unlzma.c | 1 | ||||
| -rw-r--r-- | lib/swiotlb.c | 2 | ||||
| -rw-r--r-- | lib/vsprintf.c | 16 |
7 files changed, 43 insertions, 18 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 9638d99644a..c6e854f215f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -186,6 +186,44 @@ config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC default 1 if BOOTPARAM_SOFTLOCKUP_PANIC +config DETECT_HUNG_TASK + bool "Detect Hung Tasks" + depends on DEBUG_KERNEL + default DETECT_SOFTLOCKUP + help + Say Y here to enable the kernel to detect "hung tasks", + which are bugs that cause the task to be stuck in + uninterruptible "D" state indefinitiley. + + When a hung task is detected, the kernel will print the + current stack trace (which you should report), but the + task will stay in uninterruptible state. If lockdep is + enabled then all held locks will also be reported. This + feature has negligible overhead. + +config BOOTPARAM_HUNG_TASK_PANIC + bool "Panic (Reboot) On Hung Tasks" + depends on DETECT_HUNG_TASK + help + Say Y here to enable the kernel to panic on "hung tasks", + which are bugs that cause the kernel to leave a task stuck + in uninterruptible "D" state. + + The panic can be used in combination with panic_timeout, + to cause the system to reboot automatically after a + hung task has been detected. This feature is useful for + high-availability systems that have uptime guarantees and + where a hung tasks must be resolved ASAP. + + Say N if unsure. + +config BOOTPARAM_HUNG_TASK_PANIC_VALUE + int + depends on DETECT_HUNG_TASK + range 0 1 + default 0 if !BOOTPARAM_HUNG_TASK_PANIC + default 1 if BOOTPARAM_HUNG_TASK_PANIC + config SCHED_DEBUG bool "Collect scheduler debugging info" depends on DEBUG_KERNEL && PROC_FS diff --git a/lib/debug_locks.c b/lib/debug_locks.c index 0218b4693dd..bc3b11731b9 100644 --- a/lib/debug_locks.c +++ b/lib/debug_locks.c @@ -36,7 +36,7 @@ int debug_locks_silent; */ int debug_locks_off(void) { - if (xchg(&debug_locks, 0)) { + if (__debug_locks_off()) { if (!debug_locks_silent) { oops_in_progress = 1; console_verbose(); diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c index 5d3ddb5fcfd..708e2a86d87 100644 --- a/lib/decompress_bunzip2.c +++ b/lib/decompress_bunzip2.c @@ -50,6 +50,7 @@ #endif /* !STATIC */ #include <linux/decompress/mm.h> +#include <linux/slab.h> #ifndef INT_MAX #define INT_MAX 0x7fffffff diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c index 839a329b4fc..e36b296fc9f 100644 --- a/lib/decompress_inflate.c +++ b/lib/decompress_inflate.c @@ -23,6 +23,7 @@ #endif /* STATIC */ #include <linux/decompress/mm.h> +#include <linux/slab.h> #define INBUF_LEN (16*1024) diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c index 546f2f4c157..32123a1340e 100644 --- a/lib/decompress_unlzma.c +++ b/lib/decompress_unlzma.c @@ -34,6 +34,7 @@ #endif /* STATIC */ #include <linux/decompress/mm.h> +#include <linux/slab.h> #define MIN(a, b) (((a) < (b)) ? (a) : (b)) diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 32e2bd3b114..2b0b5a7d2ce 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -549,7 +549,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, dma_addr_t dev_addr; void *ret; int order = get_order(size); - u64 dma_mask = DMA_32BIT_MASK; + u64 dma_mask = DMA_BIT_MASK(32); if (hwdev && hwdev->coherent_dma_mask) dma_mask = hwdev->coherent_dma_mask; diff --git a/lib/vsprintf.c b/lib/vsprintf.c index be3001f912e..7536acea135 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1051,13 +1051,6 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) if (str < end) *str = '%'; ++str; - if (*fmt) { - if (str < end) - *str = *fmt; - ++str; - } else { - --fmt; - } break; case FORMAT_TYPE_NRCHARS: { @@ -1339,8 +1332,6 @@ do { \ break; case FORMAT_TYPE_INVALID: - if (!*fmt) - --fmt; break; case FORMAT_TYPE_NRCHARS: { @@ -1523,13 +1514,6 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) if (str < end) *str = '%'; ++str; - if (*fmt) { - if (str < end) - *str = *fmt; - ++str; - } else { - --fmt; - } break; case FORMAT_TYPE_NRCHARS: |