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m68k, exec: remove redundant set_fs(USER_DS)

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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>
This commit is contained in:
Mathias Krause 2011-07-25 17:12:42 -07:00 committed by Linus Torvalds
parent f796062598
commit b7de110044
3 changed files with 2 additions and 6 deletions
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4
arch/m68k/include/asm/processor.h
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@ -105,9 +105,6 @@ struct thread_struct {
static inline void start_thread(struct pt_regs * regs, unsigned long pc, static inline void start_thread(struct pt_regs * regs, unsigned long pc,
unsigned long usp) unsigned long usp)
{ {
/* reads from user space */
set_fs(USER_DS);
regs->pc = pc; regs->pc = pc;
regs->sr &= ~0x2000; regs->sr &= ~0x2000;
wrusp(usp); wrusp(usp);
@ -129,7 +126,6 @@ extern int handle_kernel_fault(struct pt_regs *regs);
#define start_thread(_regs, _pc, _usp) \ #define start_thread(_regs, _pc, _usp) \
do { \ do { \
set_fs(USER_DS); /* reads from user space */ \
(_regs)->pc = (_pc); \ (_regs)->pc = (_pc); \
((struct switch_stack *)(_regs))[-1].a6 = 0; \ ((struct switch_stack *)(_regs))[-1].a6 = 0; \
reformat(_regs); \ reformat(_regs); \

2
arch/m68k/kernel/process_mm.c
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@ -185,7 +185,7 @@ EXPORT_SYMBOL(kernel_thread);
void flush_thread(void) void flush_thread(void)
{ {
unsigned long zero = 0; unsigned long zero = 0;
set_fs(USER_DS);
current->thread.fs = __USER_DS; current->thread.fs = __USER_DS;
if (!FPU_IS_EMU) if (!FPU_IS_EMU)
asm volatile (".chip 68k/68881\n\t" asm volatile (".chip 68k/68881\n\t"

2
arch/m68k/kernel/process_no.c
View File

@ -158,7 +158,7 @@ void flush_thread(void)
#ifdef CONFIG_FPU #ifdef CONFIG_FPU
unsigned long zero = 0; unsigned long zero = 0;
#endif #endif
set_fs(USER_DS);
current->thread.fs = __USER_DS; current->thread.fs = __USER_DS;
#ifdef CONFIG_FPU #ifdef CONFIG_FPU
if (!FPU_IS_EMU) if (!FPU_IS_EMU)