compat: move compat_siginfo_t definition to asm/compat.h

This is a preparatory patch for the introduction of NT_SIGINFO elf note.

Make the location of compat_siginfo_t uniform across eight architectures
which have it.  Now it can be pulled in by including asm/compat.h or
linux/compat.h.

Most of the copies are verbatim.  compat_uid[32]_t had to be replaced by
__compat_uid[32]_t.  compat_uptr_t had to be moved up before
compat_siginfo_t in asm/compat.h on a several architectures (tile already
had it moved up).  compat_sigval_t had to be relocated from linux/compat.h
to asm/compat.h.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: "Jonathan M. Foote" <jmfoote@cert.org>
Cc: Roland McGrath <roland@hack.frob.com>
Cc: Pedro Alves <palves@redhat.com>
Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 59 insertions, 54 deletions

diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h
index a670a33ad736..37e610dc084e 100644
--- a/arch/arm64/include/asm/compat.h
+++ b/arch/arm64/include/asm/compat.h
@@ -55,6 +55,7 @@ typedef s64		compat_s64;
 typedef u32             compat_uint_t;
 typedef u32             compat_ulong_t;
 typedef u64             compat_u64;
+typedef u32             compat_uptr_t;
 
 struct compat_timespec {
         compat_time_t   tv_sec;
@@ -130,6 +131,64 @@ typedef u32		compat_old_sigset_t;
 
 typedef u32             compat_sigset_word;
 
+typedef union compat_sigval {
+        compat_int_t    sival_int;
+        compat_uptr_t   sival_ptr;
+} compat_sigval_t;
+
+typedef struct compat_siginfo {
+        int si_signo;
+        int si_errno;
+        int si_code;
+
+        union {
+                /* The padding is the same size as AArch64. */
+                int _pad[128/sizeof(int) - 3];
+
+                /* kill() */
+                struct {
+                        compat_pid_t _pid;      /* sender's pid */
+                        __compat_uid32_t _uid;  /* sender's uid */
+                } _kill;
+
+                /* POSIX.1b timers */
+                struct {
+                        compat_timer_t _tid;    /* timer id */
+                        int _overrun;           /* overrun count */
+                        compat_sigval_t _sigval;        /* same as below */
+                        int _sys_private;       /* not to be passed to user */
+                } _timer;
+
+                /* POSIX.1b signals */
+                struct {
+                        compat_pid_t _pid;      /* sender's pid */
+                        __compat_uid32_t _uid;  /* sender's uid */
+                        compat_sigval_t _sigval;
+                } _rt;
+
+                /* SIGCHLD */
+                struct {
+                        compat_pid_t _pid;      /* which child */
+                        __compat_uid32_t _uid;  /* sender's uid */
+                        int _status;            /* exit code */
+                        compat_clock_t _utime;
+                        compat_clock_t _stime;
+                } _sigchld;
+
+                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
+                struct {
+                        compat_uptr_t _addr; /* faulting insn/memory ref. */
+                        short _addr_lsb; /* LSB of the reported address */
+                } _sigfault;
+
+                /* SIGPOLL */
+                struct {
+                        compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
+                        int _fd;
+                } _sigpoll;
+        } _sifields;
+} compat_siginfo_t;
+
 #define COMPAT_OFF_T_MAX        0x7fffffff
 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 
@@ -139,7 +198,6 @@ typedef u32		compat_sigset_word;
  * as pointers because the syscall entry code will have
  * appropriately converted them already.
  */
-typedef u32             compat_uptr_t;
 
 static inline void __user *compat_ptr(compat_uptr_t uptr)
 {
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index ac74c2f261e3..0790a87a4346 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -30,59 +30,6 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
-typedef struct compat_siginfo {
-        int si_signo;
-        int si_errno;
-        int si_code;
-
-        union {
-                /* The padding is the same size as AArch64. */
-                int _pad[SI_PAD_SIZE];
-
-                /* kill() */
-                struct {
-                        compat_pid_t _pid;      /* sender's pid */
-                        __compat_uid32_t _uid;  /* sender's uid */
-                } _kill;
-
-                /* POSIX.1b timers */
-                struct {
-                        compat_timer_t _tid;    /* timer id */
-                        int _overrun;           /* overrun count */
-                        compat_sigval_t _sigval;        /* same as below */
-                        int _sys_private;       /* not to be passed to user */
-                } _timer;
-
-                /* POSIX.1b signals */
-                struct {
-                        compat_pid_t _pid;      /* sender's pid */
-                        __compat_uid32_t _uid;  /* sender's uid */
-                        compat_sigval_t _sigval;
-                } _rt;
-
-                /* SIGCHLD */
-                struct {
-                        compat_pid_t _pid;      /* which child */
-                        __compat_uid32_t _uid;  /* sender's uid */
-                        int _status;            /* exit code */
-                        compat_clock_t _utime;
-                        compat_clock_t _stime;
-                } _sigchld;
-
-                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
-                struct {
-                        compat_uptr_t _addr; /* faulting insn/memory ref. */
-                        short _addr_lsb; /* LSB of the reported address */
-                } _sigfault;
-
-                /* SIGPOLL */
-                struct {
-                        compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
-                        int _fd;
-                } _sigpoll;
-        } _sifields;
-} compat_siginfo_t;
-
 struct compat_sigaction {
         compat_uptr_t                   sa_handler;
         compat_ulong_t                  sa_flags;