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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-26 07:44:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-26 07:44:09 -0800 |
| commit | 7c811e4b6af424c295e3c6438fdc9b647fe6595f (patch) | |
| tree | feab985b30e44102eca093e71ccdfad4f0318087 /include/asm-x86/futex.h | |
| parent | 37c00b84d0c1b5c4c65ae837e2235160c03e84c2 (diff) | |
| parent | f18edc95a37a901ffcbe91f5e05105f916a04fae (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86
* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (24 commits)
x86: no robust/pi futex for real i386 CPUs
x86: fix boot failure on 486 due to TSC breakage
x86: fix build on non-C locales.
x86: make c_idle.work have a static address.
x86: don't save unreliable stack trace entries
x86: don't make swapper_pg_pmd global
x86: don't print a warning when MTRR are blank and running in KVM
x86: fix execve with -fstack-protect
x86: fix vsyscall wreckage
x86: rename KERNEL_TEXT_SIZE => KERNEL_IMAGE_SIZE
x86: fix spontaneous reboot with allyesconfig bzImage
x86: remove double-checking empty zero pages debug
x86: notsc is ignored on common configurations
x86/mtrr: fix kernel-doc missing notation
x86: handle BIOSes which terminate e820 with CF=1 and no SMAP
x86: add comments for NOPs
x86: don't use P6_NOPs if compiling with CONFIG_X86_GENERIC
x86: require family >= 6 if we are using P6 NOPs
x86: do not promote TM3x00/TM5x00 to i686-class
x86: hpet fix docbook comment
...
Diffstat (limited to 'include/asm-x86/futex.h')
| -rw-r--r-- | include/asm-x86/futex.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-x86/futex.h b/include/asm-x86/futex.h index cd9f894dd2d..c9952ea9f69 100644 --- a/include/asm-x86/futex.h +++ b/include/asm-x86/futex.h @@ -102,6 +102,13 @@ futex_atomic_op_inuser(int encoded_op, int __user *uaddr) static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) { + +#if defined(CONFIG_X86_32) && !defined(CONFIG_X86_BSWAP) + /* Real i386 machines have no cmpxchg instruction */ + if (boot_cpu_data.x86 == 3) + return -ENOSYS; +#endif + if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; |