Chris Metcalf 5df7085368 tile: use a more conservative __my_cpu_offset in CONFIG_PREEMPT ... commit f862eefec0 upstream. It turns out the kernel relies on barrier() to force a reload of the percpu offset value. Since we can't easily modify the definition of barrier() to include "tp" as an output register, we instead provide a definition of __my_cpu_offset as extended assembly that includes a fake stack read to hazard against barrier(), forcing gcc to know that it must reread "tp" and recompute anything based on "tp" after a barrier. This fixes observed hangs in the slub allocator when we are looping on a percpu cmpxchg_double. A similar fix for ARMv7 was made in June in change 509eb76ebf. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-10-13 15:42:50 -07:00
..
configs	arch/tile/configs: convert to minimal configs via "make savedefconfig"	2012-03-14 14:33:16 -04:00
include	tile: use a more conservative __my_cpu_offset in CONFIG_PREEMPT	2013-10-13 15:42:50 -07:00
kernel	tile: expect new initramfs name from hypervisor file system	2013-04-05 10:04:14 -07:00
kvm	virtio: expose for non-virtualization users too	2011-07-23 16:20:30 +09:30
lib	tilepro: work around module link error with gcc 4.7	2013-06-27 11:27:30 -07:00
mm	arch/tile: remove bogus performance optimization	2012-04-02 12:13:59 -04:00
Kbuild
Kconfig	tilegx: enable SYSCALL_WRAPPERS support	2012-05-18 13:33:24 -04:00
Kconfig.debug	lib: consolidate DEBUG_STACK_USAGE option	2011-05-25 08:39:54 -07:00
Makefile	arch/tile: avoid generating .eh_frame information in modules	2012-10-28 10:14:12 -07:00