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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-07 11:36:54 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-13 16:26:01 -0400 |
| commit | bc1a298f4e04833db4c430df59b90039f0170515 (patch) | |
| tree | 802da739309efeab62317f62ec4f1989f3f7d8dd /arch/tile/lib | |
| parent | 1182b69cb24c4f7d7ee8c8afe41b5ab2bc05a15b (diff) | |
| download | blackbird-obmc-linux-bc1a298f4e04833db4c430df59b90039f0170515.tar.gz blackbird-obmc-linux-bc1a298f4e04833db4c430df59b90039f0170515.zip | |
tile: support CONFIG_PREEMPT
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>
Diffstat (limited to 'arch/tile/lib')
| -rw-r--r-- | arch/tile/lib/memcpy_tile64.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/tile/lib/memcpy_tile64.c b/arch/tile/lib/memcpy_tile64.c index 3bc4b4e40d93..0290c222847b 100644 --- a/arch/tile/lib/memcpy_tile64.c +++ b/arch/tile/lib/memcpy_tile64.c @@ -65,7 +65,7 @@ static void memcpy_multicache(void *dest, const void *source, pmd_t *pmdp; pte_t *ptep; int type0, type1; - int cpu = get_cpu(); + int cpu = smp_processor_id(); /* * Disable interrupts so that we don't recurse into memcpy() @@ -126,7 +126,6 @@ static void memcpy_multicache(void *dest, const void *source, kmap_atomic_idx_pop(); sim_allow_multiple_caching(0); local_irq_restore(flags); - put_cpu(); } /* @@ -137,6 +136,9 @@ static void memcpy_multicache(void *dest, const void *source, static unsigned long fast_copy(void *dest, const void *source, int len, memcpy_t func) { + int cpu = get_cpu(); + unsigned long retval; + /* * Check if it's big enough to bother with. We may end up doing a * small copy via TLB manipulation if we're near a page boundary, @@ -158,7 +160,7 @@ retry_source: !hv_pte_get_readable(src_pte) || hv_pte_get_mode(src_pte) != HV_PTE_MODE_CACHE_TILE_L3) break; - if (get_remote_cache_cpu(src_pte) == smp_processor_id()) + if (get_remote_cache_cpu(src_pte) == cpu) break; src_page = pfn_to_page(pte_pfn(src_pte)); get_page(src_page); @@ -235,7 +237,9 @@ retry_dest: len -= copy_size; } - return func(dest, source, len); + retval = func(dest, source, len); + put_cpu(); + return retval; } void *memcpy(void *to, const void *from, __kernel_size_t n) |
