5 files changed, 42 insertions, 1 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 9638d99644af..c6e854f215fa 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/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 5d3ddb5fcfd9..708e2a86d87b 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 839a329b4fc4..e36b296fc9f8 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 546f2f4c157e..32123a1340e6 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 32e2bd3b1142..2b0b5a7d2ced 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;