lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sh: PMB locking overhaul.

Browse Source 
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>
This commit is contained in:
Paul Mundt
2010-02-17 21:17:02 +09:00
parent 0065b96775
commit d53a0d33bc
2 changed files with 114 additions and 56 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/sh/include/asm/mmu.h
View File

@@ -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,