From db7d9a4eb700be766cc9f29241483dbb1e748832 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sun, 24 Jul 2005 19:36:26 -0700 Subject: [SPARC64]: Move syscall success and newchild state out of thread flags. These two bits were accesses non-atomically from assembler code. So, in order to eliminate any potential races resulting from that, move these pieces of state into two bytes elsewhere in struct thread_info. Signed-off-by: David S. Miller --- include/asm-sparc64/system.h | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'include/asm-sparc64/system.h') diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index f9be2c5..ee4bdfc 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -190,24 +190,23 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \ "wrpr %%g1, %%cwp\n\t" \ "ldx [%%g6 + %3], %%o6\n\t" \ "ldub [%%g6 + %2], %%o5\n\t" \ - "ldx [%%g6 + %4], %%o7\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 + %7], %%g4\n\t" \ + "ldx [%%g6 + %6], %%g4\n\t" \ "wrpr %%g0, 0x96, %%pstate\n\t" \ - "andcc %%o7, %6, %%g0\n\t" \ - "beq,pt %%icc, 1f\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) \ : "0" (next->thread_info), \ - "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_FLAGS), "i" (TI_CWP), \ - "i" (_TIF_NEWCHILD), "i" (TI_TASK) \ + "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", \ -- cgit v1.1