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authorDavid S. Miller <davem@davemloft.net>2005-07-24 22:36:26 -0400
committerDavid S. Miller <davem@davemloft.net>2005-07-24 22:36:26 -0400
commitdb7d9a4eb700be766cc9f29241483dbb1e748832 (patch)
tree48848384df15d9404ceab05867d7f4ef6b1a4bbe /include/asm-sparc64/system.h
parentcdd5186f753b23ab51f86679bdc4cc698ab0b893 (diff)
[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 <davem@davemloft.net>
Diffstat (limited to 'include/asm-sparc64/system.h')
-rw-r--r--include/asm-sparc64/system.h11
1 files changed, 5 insertions, 6 deletions
diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h
index f9be2c5b4dc9..ee4bdfc6b88f 100644
--- a/include/asm-sparc64/system.h
+++ b/include/asm-sparc64/system.h
@@ -190,24 +190,23 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \
190 "wrpr %%g1, %%cwp\n\t" \ 190 "wrpr %%g1, %%cwp\n\t" \
191 "ldx [%%g6 + %3], %%o6\n\t" \ 191 "ldx [%%g6 + %3], %%o6\n\t" \
192 "ldub [%%g6 + %2], %%o5\n\t" \ 192 "ldub [%%g6 + %2], %%o5\n\t" \
193 "ldx [%%g6 + %4], %%o7\n\t" \ 193 "ldub [%%g6 + %4], %%o7\n\t" \
194 "mov %%g6, %%l2\n\t" \ 194 "mov %%g6, %%l2\n\t" \
195 "wrpr %%o5, 0x0, %%wstate\n\t" \ 195 "wrpr %%o5, 0x0, %%wstate\n\t" \
196 "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \ 196 "ldx [%%sp + 2047 + 0x70], %%i6\n\t" \
197 "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \ 197 "ldx [%%sp + 2047 + 0x78], %%i7\n\t" \
198 "wrpr %%g0, 0x94, %%pstate\n\t" \ 198 "wrpr %%g0, 0x94, %%pstate\n\t" \
199 "mov %%l2, %%g6\n\t" \ 199 "mov %%l2, %%g6\n\t" \
200 "ldx [%%g6 + %7], %%g4\n\t" \ 200 "ldx [%%g6 + %6], %%g4\n\t" \
201 "wrpr %%g0, 0x96, %%pstate\n\t" \ 201 "wrpr %%g0, 0x96, %%pstate\n\t" \
202 "andcc %%o7, %6, %%g0\n\t" \ 202 "brz,pt %%o7, 1f\n\t" \
203 "beq,pt %%icc, 1f\n\t" \
204 " mov %%g7, %0\n\t" \ 203 " mov %%g7, %0\n\t" \
205 "b,a ret_from_syscall\n\t" \ 204 "b,a ret_from_syscall\n\t" \
206 "1:\n\t" \ 205 "1:\n\t" \
207 : "=&r" (last) \ 206 : "=&r" (last) \
208 : "0" (next->thread_info), \ 207 : "0" (next->thread_info), \
209 "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_FLAGS), "i" (TI_CWP), \ 208 "i" (TI_WSTATE), "i" (TI_KSP), "i" (TI_NEW_CHILD), \
210 "i" (_TIF_NEWCHILD), "i" (TI_TASK) \ 209 "i" (TI_CWP), "i" (TI_TASK) \
211 : "cc", \ 210 : "cc", \
212 "g1", "g2", "g3", "g7", \ 211 "g1", "g2", "g3", "g7", \
213 "l2", "l3", "l4", "l5", "l6", "l7", \ 212 "l2", "l3", "l4", "l5", "l6", "l7", \