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| author | Rich Felker <dalias@libc.org> | 2016-07-15 05:46:52 +0200 |
|---|---|---|
| committer | Rich Felker <dalias@libc.org> | 2016-07-31 05:33:32 +0200 |
| commit | 72cc564f16ca9f61a1d13f35cb247631d888a78e (patch) | |
| tree | cb988c15311990065e9c71a9890c5cc448caefdb | |
| parent | sh: disable aliased page logic on NOMMU models (diff) | |
| download | linux-72cc564f16ca9f61a1d13f35cb247631d888a78e.tar.xz linux-72cc564f16ca9f61a1d13f35cb247631d888a78e.zip | |
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>
| -rw-r--r-- | arch/sh/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index ceeda5c1a70a..e6d88f9e978a 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -45,6 +45,7 @@ config SUPERH select OLD_SIGSUSPEND select OLD_SIGACTION select HAVE_ARCH_AUDITSYSCALL + select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_NMI help The SuperH is a RISC processor targeted for use in embedded systems |