uml: tidy fault code

Tidying in preparation for the segfault register dumping patch which follows.

void * pointers are changed to union uml_pt_regs *.  This makes the types
match reality, except in arch_fixup, which is changed to operate on a union
uml_pt_regs.  This fixes a bug in the call from segv_handler, which passes a
union uml_pt_regs, to segv, which expects to pass a struct sigcontext to
arch_fixup.

Whitespace and other style fixes.

There's also a errno printk fix.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 9 deletions

diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
index f104427d2caf..6a20d08caf91 100644
--- a/arch/um/os-Linux/skas/trap.c
+++ b/arch/um/os-Linux/skas/trap.c
@@ -18,10 +18,9 @@
 void sig_handler_common_skas(int sig, void *sc_ptr)
 {
         struct sigcontext *sc = sc_ptr;
-        struct skas_regs *r;
+        union uml_pt_regs *r;
         void (*handler)(int, union uml_pt_regs *);
-        int save_errno = errno;
-        int save_user;
+        int save_user, save_errno = errno;
 
         /* This is done because to allow SIGSEGV to be delivered inside a SEGV
          * handler.  This can happen in copy_user, and if SEGV is disabled,
@@ -31,13 +30,13 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
         if(sig == SIGSEGV)
                 change_sig(SIGSEGV, 1);
 
-        r = &TASK_REGS(get_current())->skas;
-        save_user = r->is_user;
-        r->is_user = 0;
+        r = TASK_REGS(get_current());
+        save_user = r->skas.is_user;
+        r->skas.is_user = 0;
         if ( sig == SIGFPE || sig == SIGSEGV ||
              sig == SIGBUS || sig == SIGILL ||
              sig == SIGTRAP ) {
-                GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
+                GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc);
         }
 
         change_sig(SIGUSR1, 1);
@@ -49,10 +48,10 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
             sig != SIGVTALRM && sig != SIGALRM)
                 unblock_signals();
 
-        handler(sig, (union uml_pt_regs *) r);
+        handler(sig, r);
 
         errno = save_errno;
-        r->is_user = save_user;
+        r->skas.is_user = save_user;
 }
 
 extern int ptrace_faultinfo;