sh: PMB locking overhaul.

This implements some locking for the PMB code. A high level rwlock is
added for dealing with rw accesses on the entry map while a per-entry
data structure spinlock is added to deal with the PMB entry changing out
from underneath us.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 0 insertions, 18 deletions

diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index 5453169bf052..e42c4e2a41df 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -53,24 +53,6 @@ typedef struct {
 #endif
 } mm_context_t;
 
-struct pmb_entry;
-
-struct pmb_entry {
-        unsigned long vpn;
-        unsigned long ppn;
-        unsigned long flags;
-        unsigned long size;
-
-        /*
-         * 0 .. NR_PMB_ENTRIES for specific entry selection, or
-         * PMB_NO_ENTRY to search for a free one
-         */
-        int entry;
-
-        /* Adjacent entry link for contiguous multi-entry mappings */
-        struct pmb_entry *link;
-};
-
 #ifdef CONFIG_PMB
 /* arch/sh/mm/pmb.c */
 long pmb_remap(unsigned long virt, unsigned long phys,