Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6

* 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (21 commits)
  HWPOISON: Enable error_remove_page on btrfs
  HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs
  HWPOISON: Add madvise() based injector for hardware poisoned pages v4
  HWPOISON: Enable error_remove_page for NFS
  HWPOISON: Enable .remove_error_page for migration aware file systems
  HWPOISON: The high level memory error handler in the VM v7
  HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per process
  HWPOISON: shmem: call set_page_dirty() with locked page
  HWPOISON: Define a new error_remove_page address space op for async truncation
  HWPOISON: Add invalidate_inode_page
  HWPOISON: Refactor truncate to allow direct truncating of page v2
  HWPOISON: check and isolate corrupted free pages v2
  HWPOISON: Handle hardware poisoned pages in try_to_unmap
  HWPOISON: Use bitmask/action code for try_to_unmap behaviour
  HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2
  HWPOISON: Add poison check to page fault handling
  HWPOISON: Add basic support for poisoned pages in fault handler v3
  HWPOISON: Add new SIGBUS error codes for hardware poison signals
  HWPOISON: Add support for poison swap entries v2
  HWPOISON: Export some rmap vma locking to outside world
  ...

2 files changed, 8 insertions, 1 deletions

diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h
index dd63bd38864b..5ee13b2fd223 100644
--- a/include/asm-generic/mman-common.h
+++ b/include/asm-generic/mman-common.h
@@ -34,6 +34,7 @@
 #define MADV_REMOVE     9               /* remove these pages & resources */
 #define MADV_DONTFORK   10              /* don't inherit across fork */
 #define MADV_DOFORK     11              /* do inherit across fork */
+#define MADV_HWPOISON   100             /* poison a page for testing */
 
 #define MADV_MERGEABLE   12             /* KSM may merge identical pages */
 #define MADV_UNMERGEABLE 13             /* KSM may not merge identical pages */
diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h
index c840719a8c59..942d30b5aab1 100644
--- a/include/asm-generic/siginfo.h
+++ b/include/asm-generic/siginfo.h
@@ -82,6 +82,7 @@ typedef struct siginfo {
 #ifdef __ARCH_SI_TRAPNO
                         int _trapno;    /* TRAP # which caused the signal */
 #endif
+                        short _addr_lsb; /* LSB of the reported address */
                 } _sigfault;
 
                 /* SIGPOLL */
@@ -112,6 +113,7 @@ typedef struct siginfo {
 #ifdef __ARCH_SI_TRAPNO
 #define si_trapno       _sifields._sigfault._trapno
 #endif
+#define si_addr_lsb     _sifields._sigfault._addr_lsb
 #define si_band         _sifields._sigpoll._band
 #define si_fd           _sifields._sigpoll._fd
 
@@ -192,7 +194,11 @@ typedef struct siginfo {
 #define BUS_ADRALN      (__SI_FAULT|1)  /* invalid address alignment */
 #define BUS_ADRERR      (__SI_FAULT|2)  /* non-existant physical address */
 #define BUS_OBJERR      (__SI_FAULT|3)  /* object specific hardware error */
-#define NSIGBUS         3
+/* hardware memory error consumed on a machine check: action required */
+#define BUS_MCEERR_AR   (__SI_FAULT|4)
+/* hardware memory error detected in process but not consumed: action optional*/
+#define BUS_MCEERR_AO   (__SI_FAULT|5)
+#define NSIGBUS         5
 
 /*
  * SIGTRAP si_codes