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
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arch	arch/tile: fix typo in <arch/spr_def.h>	2012-04-02 12:00:14 -04:00
asm	tile: use a more conservative __my_cpu_offset in CONFIG_PREEMPT	2013-10-13 15:42:50 -07:00
hv	arch/tile: add hypervisor-based character driver for SPI flash ROM	2011-06-10 13:07:48 -04:00