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tile: support CONFIG_PREEMPT

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This change adds support for CONFIG_PREEMPT (full kernel preemption).
In addition to the core support, this change includes a number
of places where we fix up uses of smp_processor_id() and per-cpu
variables.  I also eliminate the PAGE_HOME_HERE and PAGE_HOME_UNKNOWN
values for page homing, as it turns out they weren't being used.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2013-08-07 11:36:54 -04:00
parent 1182b69cb2
commit bc1a298f4e
14 changed files with 98 additions and 45 deletions
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8
arch/tile/include/asm/homecache.h
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@@ -44,16 +44,8 @@ struct zone;
*/
#define PAGE_HOME_INCOHERENT -3
#if CHIP_HAS_CBOX_HOME_MAP()
/* Home for the page is distributed via hash-for-home. */
#define PAGE_HOME_HASH -4
#endif
/* Homing is unknown or unspecified. Not valid for page_home(). */
#define PAGE_HOME_UNKNOWN -5
/* Home on the current cpu. Not valid for page_home(). */
#define PAGE_HOME_HERE -6
/* Support wrapper to use instead of explicit hv_flush_remote(). */
extern void flush_remote(unsigned long cache_pfn, unsigned long cache_length,