Lie about futex_atomic_cmpxchg_inatomic kernel support.

Bug-Ubuntu: https://launchpad.net/bugs/1436162
Bug-Debian: https://bugs.debian.org/788799
Last-Update: 2015-03-25

In past versions of glibc, we incorrectly assumed all ARM kernels
in all configurations supported futex_atomic_cmpxchg_inatomic. This
was clearly a lie, however it was a lie that we relied on, because
the fallback implementation appears to not play nicely with certain
applications like pulseaudio.  Restore the lie for kernels > 2.6.32
and plug our ears and scream "LA LA LA" about how wrong this is.

Gbp-Pq: Topic arm
Gbp-Pq: Name local-arm-futex.diff

diff --git a/sysdeps/unix/sysv/linux/arm/kernel-features.h b/sysdeps/unix/sysv/linux/arm/kernel-features.h
index 5c8f76630e65b4103febce8ec2a3eafc616074d9..8509047345bde42ddb3c3e04814b1a574070afb6 100644 (file)
--- a/sysdeps/unix/sysv/linux/arm/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/arm/kernel-features.h
@@ -23,7 +23,7 @@
 /* The ARM kernel before 3.14.3 may or may not support
    futex_atomic_cmpxchg_inatomic, depending on kernel
    configuration.  */
-#if __LINUX_KERNEL_VERSION < 0x030E03
+#if __LINUX_KERNEL_VERSION < 0x020620
 # undef __ASSUME_SET_ROBUST_LIST
 #endif