Fix __ASSUME_PSELECT for MicroBlaze (bug 16642)

[Joseph S. Myers]

Reviewing (for all architectures, with a baseline kernel version of
2.6.32) the kernel support for features for which __ASSUME_* macros
would be affected by a move to 2.6.32 as minimum kernel version showed
up that __ASSUME_PSELECT was wrongly defined for MicroBlaze, despite
the corresponding syscall table entry not being wired up in the
MicroBlaze kernel.

This patch makes the MicroBlaze kernel-features.h undefine
__ASSUME_PSELECT.  I'd also encourage wiring it up in the kernel (so
you can then make this #undef conditional, and eventually obsolete
once a recent-enough kernel is required).  I suspect it wasn't wired
up because of the mistaken comment in asm/unistd.h "obsolete ->
sys_pselect7" (there is no such syscall as pselect7).

2014-02-27  Joseph Myers  <joseph@codesourcery.com>

	[BZ #16642]
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	(__ASSUME_PSELECT): Undefine.

diff --git a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
index 1e9aba5..dfb8344 100644
--- a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
@@ -42,3 +42,6 @@
 #endif
 
 #include_next <kernel-features.h>
+
+/* The MicroBlaze kernel does not support the pselect6 syscall.  */
+#undef __ASSUME_PSELECT

-- 
Joseph S. Myers
joseph@codesourcery.com