diff options
| author | David S. Miller <davem@sunset.davemloft.net> | 2006-02-05 21:59:03 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-03-20 01:11:49 -0800 |
| commit | 314981ac7177a933319e3c071a5cf0a579205e6e (patch) | |
| tree | 11895da391ba91195d6d7a67debaa32a28c1215e | |
| parent | 936f482af1743141d637483ec10eb881537c26dc (diff) | |
[SPARC64]: Kill all %pstate changes in context switch code.
They are totally unnecessary because:
1) Interrupts are already disabled when switch_to()
runs.
2) We don't use hard-coded alternate globals any longer.
This found a case in rtrap, which still assumed alternate
global %g6 was current_thread_info(), and that is fixed
by this changeset as well.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc64/kernel/rtrap.S | 5 | ||||
| -rw-r--r-- | include/asm-sparc64/system.h | 5 |
2 files changed, 4 insertions, 6 deletions
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index e6130956307..a2fa277da62 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -224,7 +224,8 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 ldx [%sp + PTREGS_OFF + PT_V9_G4], %g4 ldx [%sp + PTREGS_OFF + PT_V9_G5], %g5 brz,pt %l3, 1f - nop + mov %g6, %l2 + /* Must do this before thread reg is clobbered below. */ LOAD_PER_CPU_BASE(%g5, %g6, %i0, %i1, %i2) 1: @@ -238,6 +239,8 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 SET_GL(1) .previous + mov %l2, %g6 + ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1 diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index 26c0807af3e..a18ec87a52c 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -213,7 +213,6 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \ task_thread_info(next); \ __asm__ __volatile__( \ "mov %%g4, %%g7\n\t" \ - "wrpr %%g0, 0x95, %%pstate\n\t" \ "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \ "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \ "rdpr %%wstate, %%o5\n\t" \ @@ -227,14 +226,10 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \ "ldx [%%g6 + %3], %%o6\n\t" \ "ldub [%%g6 + %2], %%o5\n\t" \ "ldub [%%g6 + %4], %%o7\n\t" \ - "mov %%g6, %%l2\n\t" \ "wrpr %%o5, 0x0, %%wstate\n\t" \ "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ - "wrpr %%g0, 0x94, %%pstate\n\t" \ - "mov %%l2, %%g6\n\t" \ "ldx [%%g6 + %6], %%g4\n\t" \ - "wrpr %%g0, 0x96, %%pstate\n\t" \ "brz,pt %%o7, 1f\n\t" \ " mov %%g7, %0\n\t" \ "b,a ret_from_syscall\n\t" \ |