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authorAnton Blanchard <anton@samba.org>2009-02-22 01:50:03 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-02-23 15:53:20 +1100
commitd839088caec6891a5070f0b1ce61031e458533a9 (patch)
treea0489611eb3edce545f7aed98764220e195ef941 /sound/Makefile
parent2dadb987e09995b2910c419cdfe2307e66537649 (diff)
powerpc: Randomise lower bits of stack address
Randomise the lower bits of the stack address. More randomisation is good for security but the scatter can also help with SMT threads that share an L1. A quick test case shows this working: int main() { int sp; printf("%x\n", (unsigned long)&sp & 4095); } before: 80 80 80 80 80 after: 610 490 300 6b0 d80 Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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