[PATCH] signals, ia64, mips: update arch-specific siginfos with pkeys field

[Dave Hansen]

This fixes a compile error that Ingo was hitting with MIPS when the
x86 pkeys patch set is applied.

ia64 and mips have separate definitions for siginfo from the
generic one.  Patch them to have the pkey fields.

Note that this is exactly what we did for MPX as well.

Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: linux-ia64@xxxxxxxxxxxxxxx
---

 b/arch/ia64/include/uapi/asm/siginfo.h |   13 +++++++++----
 b/arch/mips/include/uapi/asm/siginfo.h |   13 +++++++++----
 2 files changed, 18 insertions(+), 8 deletions(-)

diff -puN arch/ia64/include/uapi/asm/siginfo.h~pkeys-09-1-siginfo-for-mips-ia64 arch/ia64/include/uapi/asm/siginfo.h
--- a/arch/ia64/include/uapi/asm/siginfo.h~pkeys-09-1-siginfo-for-mips-ia64	2016-02-17 09:32:06.001815266 -0800
+++ b/arch/ia64/include/uapi/asm/siginfo.h	2016-02-17 09:32:06.010815672 -0800
@@ -63,10 +63,15 @@ typedef struct siginfo {
 			unsigned int _flags;	/* see below */
 			unsigned long _isr;	/* isr */
 			short _addr_lsb;	/* lsb of faulting address */
-			struct {
-				void __user *_lower;
-				void __user *_upper;
-			} _addr_bnd;
+			union {
+				/* used when si_code=SEGV_BNDERR */
+				struct {
+					void __user *_lower;
+					void __user *_upper;
+				} _addr_bnd;
+				/* used when si_code=SEGV_PKUERR */
+				u64 _pkey;
+			};
 		} _sigfault;
 
 		/* SIGPOLL */
diff -puN arch/mips/include/uapi/asm/siginfo.h~pkeys-09-1-siginfo-for-mips-ia64 arch/mips/include/uapi/asm/siginfo.h
--- a/arch/mips/include/uapi/asm/siginfo.h~pkeys-09-1-siginfo-for-mips-ia64	2016-02-17 09:32:06.003815357 -0800
+++ b/arch/mips/include/uapi/asm/siginfo.h	2016-02-17 09:32:06.010815672 -0800
@@ -86,10 +86,15 @@ typedef struct siginfo {
 			int _trapno;	/* TRAP # which caused the signal */
 #endif
 			short _addr_lsb;
-			struct {
-				void __user *_lower;
-				void __user *_upper;
-			} _addr_bnd;
+			union {
+				/* used when si_code=SEGV_BNDERR */
+				struct {
+					void __user *_lower;
+					void __user *_upper;
+				} _addr_bnd;
+				/* used when si_code=SEGV_PKUERR */
+				u64 _pkey;
+			};
 		} _sigfault;
 
 		/* SIGPOLL, SIGXFSZ (To do ...)	 */
_