3 files changed, 13 insertions, 1 deletions

diff --git a/arch/ia64/include/asm/siginfo.h b/arch/ia64/include/asm/siginfo.h
index 118d42979003..c8fcaa2ac48f 100644
--- a/arch/ia64/include/asm/siginfo.h
+++ b/arch/ia64/include/asm/siginfo.h
@@ -62,6 +62,7 @@ typedef struct siginfo {
                         int _imm;               /* immediate value for "break" */
                         unsigned int _flags;    /* see below */
                         unsigned long _isr;     /* isr */
+                        short _addr_lsb;        /* lsb of faulting address */
                 } _sigfault;
 
                 /* SIGPOLL */
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 1c5a6add779d..bdd4496ae67f 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -99,6 +99,16 @@ static int signalfd_copyinfo(struct signalfd_siginfo __user *uinfo,
 #ifdef __ARCH_SI_TRAPNO
                 err |= __put_user(kinfo->si_trapno, &uinfo->ssi_trapno);
 #endif
+#ifdef BUS_MCEERR_AO
+                /* 
+                 * Other callers might not initialize the si_lsb field,
+                 * so check explicitly for the right codes here.
+                 */
+                if (kinfo->si_code == BUS_MCEERR_AR ||
+                    kinfo->si_code == BUS_MCEERR_AO)
+                        err |= __put_user((short) kinfo->si_addr_lsb,
+                                          &uinfo->ssi_addr_lsb);
+#endif
                 break;
         case __SI_CHLD:
                 err |= __put_user(kinfo->si_pid, &uinfo->ssi_pid);
diff --git a/include/linux/signalfd.h b/include/linux/signalfd.h
index b363b916c909..3ff4961da9b5 100644
--- a/include/linux/signalfd.h
+++ b/include/linux/signalfd.h
@@ -33,6 +33,7 @@ struct signalfd_siginfo {
         __u64 ssi_utime;
         __u64 ssi_stime;
         __u64 ssi_addr;
+        __u16 ssi_addr_lsb;
 
         /*
          * Pad strcture to 128 bytes. Remember to update the
@@ -43,7 +44,7 @@ struct signalfd_siginfo {
          * comes out of a read(2) and we really don't want to have
          * a compat on read(2).
          */
-        __u8 __pad[48];
+        __u8 __pad[46];
 };