Chris Metcalf bc30c3576d 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 16:08:34 -07:00
..
configs	md: remove CONFIG_MULTICORE_RAID456 entirely	2013-03-20 13:21:14 +11:00
gxio	arch/tile: provide kernel support for the tilegx USB shim	2012-07-18 16:40:24 -04:00
include	tile: use a more conservative __my_cpu_offset in CONFIG_PREEMPT	2013-10-13 16:08:34 -07:00
kernel	Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2013-05-09 14:34:58 -07:00
kvm	arch/tile/kvm: remove depends on CONFIG_EXPERIMENTAL	2013-01-17 12:11:26 -08:00
lib	tilepro: work around module link error with gcc 4.7	2013-06-15 16:47:47 -04:00
mm	mm, vmalloc: change iterating a vmlist to find_vm_area()	2013-04-29 15:54:33 -07:00
Kbuild
Kconfig	Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2013-05-09 14:34:58 -07:00
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	2012-10-23 10:21:43 -04:00