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| author | David S. Miller <davem@sunset.davemloft.net> | 2007-08-18 09:07:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-08-21 08:40:00 +0200 |
| commit | 195f7fd0a7e2b3179d52aa8ed6de3637203946c6 (patch) | |
| tree | 7737c243489bed4bd23db45f3ced089ebf24a8ce /include/asm-sparc64/system.h | |
| parent | dio: zero struct dio with kzalloc instead of manually (diff) | |
| download | linux-195f7fd0a7e2b3179d52aa8ed6de3637203946c6.tar.xz linux-195f7fd0a7e2b3179d52aa8ed6de3637203946c6.zip | |
[SPARC64]: Need to clobber global reg vars in switch_to().
Otherwise the compiler can't see the things like the
per-cpu area base register are changing.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | include/asm-sparc64/system.h | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index 64891cb10f05..3f175fa7e6d2 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -141,7 +141,6 @@ do { \ * not preserve it's value. Hairy, but it lets us remove 2 loads * and 2 stores in this critical code path. -DaveM */ -#define EXTRA_CLOBBER ,"%l1" #define switch_to(prev, next, last) \ do { if (test_thread_flag(TIF_PERFCTR)) { \ unsigned long __tmp; \ @@ -164,33 +163,34 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \ "stx %%i6, [%%sp + 2047 + 0x70]\n\t" \ "stx %%i7, [%%sp + 2047 + 0x78]\n\t" \ "rdpr %%wstate, %%o5\n\t" \ - "stx %%o6, [%%g6 + %3]\n\t" \ - "stb %%o5, [%%g6 + %2]\n\t" \ - "rdpr %%cwp, %%o5\n\t" \ + "stx %%o6, [%%g6 + %6]\n\t" \ "stb %%o5, [%%g6 + %5]\n\t" \ - "mov %1, %%g6\n\t" \ - "ldub [%1 + %5], %%g1\n\t" \ + "rdpr %%cwp, %%o5\n\t" \ + "stb %%o5, [%%g6 + %8]\n\t" \ + "mov %4, %%g6\n\t" \ + "ldub [%4 + %8], %%g1\n\t" \ "wrpr %%g1, %%cwp\n\t" \ - "ldx [%%g6 + %3], %%o6\n\t" \ - "ldub [%%g6 + %2], %%o5\n\t" \ - "ldub [%%g6 + %4], %%o7\n\t" \ + "ldx [%%g6 + %6], %%o6\n\t" \ + "ldub [%%g6 + %5], %%o5\n\t" \ + "ldub [%%g6 + %7], %%o7\n\t" \ "wrpr %%o5, 0x0, %%wstate\n\t" \ "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ - "ldx [%%g6 + %6], %%g4\n\t" \ + "ldx [%%g6 + %9], %%g4\n\t" \ "brz,pt %%o7, 1f\n\t" \ " mov %%g7, %0\n\t" \ "b,a ret_from_syscall\n\t" \ "1:\n\t" \ - : "=&r" (last) \ + : "=&r" (last), "=r" (current), "=r" (current_thread_info_reg), \ + "=r" (__local_per_cpu_offset) \ : "0" (task_thread_info(next)), \ "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_NEW_CHILD), \ "i" (TI_CWP), "i" (TI_TASK) \ : "cc", \ "g1", "g2", "g3", "g7", \ - "l2", "l3", "l4", "l5", "l6", "l7", \ + "l1", "l2", "l3", "l4", "l5", "l6", "l7", \ "i0", "i1", "i2", "i3", "i4", "i5", \ - "o0", "o1", "o2", "o3", "o4", "o5", "o7" EXTRA_CLOBBER);\ + "o0", "o1", "o2", "o3", "o4", "o5", "o7"); \ /* If you fuck with this, update ret_from_syscall code too. */ \ if (test_thread_flag(TIF_PERFCTR)) { \ write_pcr(current_thread_info()->pcr_reg); \ |