Chris Metcalf 583b24a210 arch/tile: adopt prepare_exit_to_usermode() model from x86 ... This change is a prerequisite change for TASK_ISOLATION but also stands on its own for readability and maintainability. The existing tile do_work_pending() was called in a loop from assembly on the slow path; this change moves the loop into C code as well. For the x86 version see commit c5c46f59e4 ("x86/entry: Add new, comprehensible entry and exit handlers written in C"). This change exposes a pre-existing bug on the older tilepro platform; the singlestep processing is done last, but on tilepro (unlike tilegx) we enable interrupts while doing that processing, so we could in theory miss a signal or other asynchronous event. A future change could fix this by breaking the singlestep work into a "prepare" step done in the main loop, and a "trigger" step done after exiting the loop. Since this change is intended as purely a restructuring change, we call out the bug explicitly now, but don't yet fix it. Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>		2016-01-18 14:49:09 -05:00
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arch	tile: <arch/> header updates from upstream	2013-09-16 15:47:26 -04:00
asm	arch/tile: adopt prepare_exit_to_usermode() model from x86	2016-01-18 14:49:09 -05:00
gxio	ptp: tilegx: convert to the 64 bit get/set time methods.	2015-03-31 12:01:18 -04:00
hv	tile: support delivering NMIs for multicore backtrace	2015-05-11 11:22:31 -04:00
uapi	mm: mlock: add mlock flags to enable VM_LOCKONFAULT usage	2015-11-05 19:34:48 -08:00