x86: Rename trap_no to trap_nr in thread_struct

There are precedences of trap number being referred to as
trap_nr. However thread struct refers trap number as trap_no.
Change it to trap_nr.

Also use enum instead of left-over literals for trap values.

This is pure cleanup, no functional change intended.

Suggested-by: Ingo Molnar <mingo@eltu.hu>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Linux-mm <linux-mm@kvack.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20120312092555.5379.942.sendpatchset@srdronam.in.ibm.com
[ Fixed the math-emu build ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

6 files changed, 14 insertions, 13 deletions

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 4025fe4f928..28f98706b08 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -265,7 +265,7 @@ int __kprobes __die(const char *str, struct pt_regs *regs, long err)
 #endif
         printk("\n");
         if (notify_die(DIE_OOPS, str, regs, err,
-                        current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+                        current->thread.trap_nr, SIGSEGV) == NOTIFY_STOP)
                 return 1;
 
         show_registers(regs);
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 93e7877a19c..6fb330adc7c 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -33,6 +33,7 @@
 #include <asm/prctl.h>
 #include <asm/proto.h>
 #include <asm/hw_breakpoint.h>
+#include <asm/traps.h>
 
 #include "tls.h"
 
@@ -1425,7 +1426,7 @@ static void fill_sigtrap_info(struct task_struct *tsk,
                                 int error_code, int si_code,
                                 struct siginfo *info)
 {
-        tsk->thread.trap_no = 1;
+        tsk->thread.trap_nr = X86_TRAP_DB;
         tsk->thread.error_code = error_code;
 
         memset(info, 0, sizeof(*info));
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index c3846b6fb72..9c73acc1c86 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -150,7 +150,7 @@ int setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
                 put_user_ex(regs->r15, &sc->r15);
 #endif /* CONFIG_X86_64 */
 
-                put_user_ex(current->thread.trap_no, &sc->trapno);
+                put_user_ex(current->thread.trap_nr, &sc->trapno);
                 put_user_ex(current->thread.error_code, &sc->err);
                 put_user_ex(regs->ip, &sc->ip);
 #ifdef CONFIG_X86_32
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 037fc2bc531..c6d17ad59b8 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -132,7 +132,7 @@ do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
 trap_signal:
 #endif
         /*
-         * We want error_code and trap_no set for userspace faults and
+         * We want error_code and trap_nr set for userspace faults and
          * kernelspace faults which result in die(), but not
          * kernelspace faults which are fixed up.  die() gives the
          * process no chance to handle the signal and notice the
@@ -141,7 +141,7 @@ trap_signal:
          * delivered, faults.  See also do_general_protection below.
          */
         tsk->thread.error_code = error_code;
-        tsk->thread.trap_no = trapnr;
+        tsk->thread.trap_nr = trapnr;
 
 #ifdef CONFIG_X86_64
         if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
@@ -164,7 +164,7 @@ trap_signal:
 kernel_trap:
         if (!fixup_exception(regs)) {
                 tsk->thread.error_code = error_code;
-                tsk->thread.trap_no = trapnr;
+                tsk->thread.trap_nr = trapnr;
                 die(str, regs, error_code);
         }
         return;
@@ -240,7 +240,7 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
         notify_die(DIE_TRAP, str, regs, error_code, X86_TRAP_DF, SIGSEGV);
 
         tsk->thread.error_code = error_code;
-        tsk->thread.trap_no = X86_TRAP_DF;
+        tsk->thread.trap_nr = X86_TRAP_DF;
 
         /*
          * This is always a kernel trap and never fixable (and thus must
@@ -268,7 +268,7 @@ do_general_protection(struct pt_regs *regs, long error_code)
                 goto gp_in_kernel;
 
         tsk->thread.error_code = error_code;
-        tsk->thread.trap_no = X86_TRAP_GP;
+        tsk->thread.trap_nr = X86_TRAP_GP;
 
         if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
                         printk_ratelimit()) {
@@ -295,7 +295,7 @@ gp_in_kernel:
                 return;
 
         tsk->thread.error_code = error_code;
-        tsk->thread.trap_no = X86_TRAP_GP;
+        tsk->thread.trap_nr = X86_TRAP_GP;
         if (notify_die(DIE_GPF, "general protection fault", regs, error_code,
                         X86_TRAP_GP, SIGSEGV) == NOTIFY_STOP)
                 return;
@@ -475,7 +475,7 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
         {
                 if (!fixup_exception(regs)) {
                         task->thread.error_code = error_code;
-                        task->thread.trap_no = trapnr;
+                        task->thread.trap_nr = trapnr;
                         die(str, regs, error_code);
                 }
                 return;
@@ -485,7 +485,7 @@ void math_error(struct pt_regs *regs, int error_code, int trapnr)
          * Save the info for the exception handler and clear the error.
          */
         save_init_fpu(task);
-        task->thread.trap_no = trapnr;
+        task->thread.trap_nr = trapnr;
         task->thread.error_code = error_code;
         info.si_signo = SIGFPE;
         info.si_errno = 0;
diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index b466cab5ba1..a1315ab2d6b 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -567,7 +567,7 @@ int handle_vm86_trap(struct kernel_vm86_regs *regs, long error_code, int trapno)
         }
         if (trapno != 1)
                 return 1; /* we let this handle by the calling routine */
-        current->thread.trap_no = trapno;
+        current->thread.trap_nr = trapno;
         current->thread.error_code = error_code;
         force_sig(SIGTRAP, current);
         return 0;
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index b07ba939356..327509b95e0 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -153,7 +153,7 @@ static bool write_ok_or_segv(unsigned long ptr, size_t size)
 
                 thread->error_code      = 6;  /* user fault, no page, write */
                 thread->cr2             = ptr;
-                thread->trap_no         = 14;
+                thread->trap_nr         = X86_TRAP_PF;
 
                 memset(&info, 0, sizeof(info));
                 info.si_signo           = SIGSEGV;