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authorMathias Krause <minipli@googlemail.com>2011-07-25 17:12:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 20:57:12 -0700
commitb7de110044b4e26adcb7b278d14da93133692ed7 (patch)
tree33723340931b8c3e8b68808cafae2a075de3215d /arch/m68k
parentf796062598235b9f73086d0fb779e120ae9581a0 (diff)
m68k, exec: remove redundant set_fs(USER_DS)
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>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/include/asm/processor.h4
-rw-r--r--arch/m68k/kernel/process_mm.c2
-rw-r--r--arch/m68k/kernel/process_no.c2
3 files changed, 2 insertions, 6 deletions
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index f111b02b704f..d8ef53ac03f9 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -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); \
diff --git a/arch/m68k/kernel/process_mm.c b/arch/m68k/kernel/process_mm.c
index c2a1fc23dd75..1bc223aa07ec 100644
--- a/arch/m68k/kernel/process_mm.c
+++ b/arch/m68k/kernel/process_mm.c
@@ -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"
diff --git a/arch/m68k/kernel/process_no.c b/arch/m68k/kernel/process_no.c
index 9b86ad11c68e..69c1803fcf1b 100644
--- a/arch/m68k/kernel/process_no.c
+++ b/arch/m68k/kernel/process_no.c
@@ -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)