From: Thomas Gleixner Date: Mon, 14 Mar 2011 19:00:30 +0000 (+0100) Subject: arm: Remove bogus comment in futex_atomic_cmpxchg_inatomic() X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=07d5ecae2940ddd77746e2fb597dcf57d3c2e277;p=deliverable%2Flinux.git arm: Remove bogus comment in futex_atomic_cmpxchg_inatomic() commit 522d7dec(futex: Remove redundant pagefault_disable in futex_atomic_cmpxchg_inatomic()) added a bogus comment. /* Note that preemption is disabled by futex_atomic_cmpxchg_inatomic * call sites. */ Bogus in two aspects: 1) pagefault_disable != preempt_disable even if the mechanism we use is the same 2) we have a call site which deliberately does not disable pagefaults as it wants the possible fault to be handled - though that has been changed for consistency reasons now. Sigh. I really should have seen that when committing the above. :( Catched-by-and-rightfully-ranted-at-by: Linus Torvalds Signed-off-by: Thomas Gleixner LKML-Reference: Cc: Michel Lespinasse Cc: Darren Hart --- diff --git a/arch/arm/include/asm/futex.h b/arch/arm/include/asm/futex.h index 0e29d8e6a5c2..199a6b6de7f4 100644 --- a/arch/arm/include/asm/futex.h +++ b/arch/arm/include/asm/futex.h @@ -97,9 +97,6 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) return -EFAULT; - /* Note that preemption is disabled by futex_atomic_cmpxchg_inatomic - * call sites. */ - __asm__ __volatile__("@futex_atomic_cmpxchg_inatomic\n" "1: " T(ldr) " %1, [%4]\n" " teq %1, %2\n"