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(parent: 57155c6) | patch
sh: fix futex/robust_list on nommu models
authorRich Felker <dalias@libc.org>
Fri, 15 Jul 2016 03:46:52 +0000 (03:46 +0000)
committerRich Felker <dalias@libc.org>
Sun, 31 Jul 2016 03:33:32 +0000 (03:33 +0000)
commit72cc564f16ca9f61a1d13f35cb247631d888a78e
treecb988c15311990065e9c71a9890c5cc448caefdbtree | snapshot (tar.gz zip)
parent57155c6523074dd937b8feafcfaa98c82218faa6commit | diff
sh: fix futex/robust_list on nommu models

The futex cmpxchg runtime testing in kernel/futex.c depends on
accesses to address 0 producing EFAULT, which obviously does not work
on nommu. Since SH always has cmpxchg, disable the broken runtime
detection.

At some point this should be fixed at the kernel/futex.c level. UP
machines can always provide a working cmpxchg with interrupt masking,
and SMP cannot function without a working cmpxchg anyway.

Signed-off-by: Rich Felker <dalias@libc.org>
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