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author | Anton Blanchard <anton@samba.org> | 2017-03-05 02:54:34 +0300 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-03-06 13:44:09 +0300 |
commit | 6ba422c75facb1b1e0e206c464ee121b8073f7e0 (patch) | |
tree | 5ab7573657019a678a3607d59a913be3cc86caa3 /.cocciconfig | |
parent | 014d02cbf16b3106dc8e93281d2a9c189751ed5e (diff) | |
download | linux-6ba422c75facb1b1e0e206c464ee121b8073f7e0.tar.xz |
powerpc/64: Avoid panic during boot due to divide by zero in init_cache_info()
I see a panic in early boot when building with a recent gcc toolchain.
The issue is a divide by zero, which is undefined. Older toolchains
let us get away with it:
int foo(int a) { return a / 0; }
foo:
li 9,0
divw 3,3,9
extsw 3,3
blr
But newer ones catch it:
foo:
trap
Add a check to avoid the divide by zero.
Fixes: e2827fe5c156 ("powerpc/64: Clean up ppc64_caches using a struct per cache")
Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to '.cocciconfig')
0 files changed, 0 insertions, 0 deletions