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[PATCH] powerpc: vdso 64bits gettimeofday bug
A bug in the assembly code of the vdso can cause gettimeofday() to hang or to return incorrect results. The wrong register was used to test for pending updates of the calibration variables and to create a dependency for subsequent loads. This fixes it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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1 changed files with 2 additions and 2 deletions
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@ -225,9 +225,9 @@ V_FUNCTION_BEGIN(__do_get_xsec)
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.cfi_startproc
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/* check for update count & load values */
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1: ld r8,CFG_TB_UPDATE_COUNT(r3)
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andi. r0,r4,1 /* pending update ? loop */
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andi. r0,r8,1 /* pending update ? loop */
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bne- 1b
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xor r0,r4,r4 /* create dependency */
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xor r0,r8,r8 /* create dependency */
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add r3,r3,r0
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/* Get TB & offset it */
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