m68k, exec: remove redundant set_fs(USER_DS)
Mathias Krause [Tue, 26 Jul 2011 00:12:42 +0000 (17:12 -0700)]
The address limit is already set in flush_old_exec() so those calls to
set_fs(USER_DS) are redundant.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/m68k/include/asm/processor.h
arch/m68k/kernel/process_mm.c
arch/m68k/kernel/process_no.c

index f111b02..d8ef53a 100644 (file)
@@ -105,9 +105,6 @@ struct thread_struct {
 static inline void start_thread(struct pt_regs * regs, unsigned long pc,
                                unsigned long usp)
 {
-       /* reads from user space */
-       set_fs(USER_DS);
-
        regs->pc = pc;
        regs->sr &= ~0x2000;
        wrusp(usp);
@@ -129,7 +126,6 @@ extern int handle_kernel_fault(struct pt_regs *regs);
 
 #define start_thread(_regs, _pc, _usp)                  \
 do {                                                    \
-       set_fs(USER_DS); /* reads from user space */    \
        (_regs)->pc = (_pc);                            \
        ((struct switch_stack *)(_regs))[-1].a6 = 0;    \
        reformat(_regs);                                \
index c2a1fc2..1bc223a 100644 (file)
@@ -185,7 +185,7 @@ EXPORT_SYMBOL(kernel_thread);
 void flush_thread(void)
 {
        unsigned long zero = 0;
-       set_fs(USER_DS);
+
        current->thread.fs = __USER_DS;
        if (!FPU_IS_EMU)
                asm volatile (".chip 68k/68881\n\t"
index 9b86ad1..69c1803 100644 (file)
@@ -158,7 +158,7 @@ void flush_thread(void)
 #ifdef CONFIG_FPU
        unsigned long zero = 0;
 #endif
-       set_fs(USER_DS);
+
        current->thread.fs = __USER_DS;
 #ifdef CONFIG_FPU
        if (!FPU_IS_EMU)