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authorAndreas Herrmann <andreas.herrmann3@amd.com>2008-06-20 22:05:37 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-24 13:05:55 +0200
commitf6887264deba4cd991f0ca006918dcff4c939021 (patch)
tree5becb05dfc2b328b0e8f90594f7a86cf0da69d52 /arch/x86/mm
parent3e9c83b309fd7cbf1d9b801d0d5877c040e30420 (diff)
x86: pat.c consolidate list_add handling in reserve_memtype
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Suresh B Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/pat.c21
1 files changed, 8 insertions, 13 deletions
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index 1118288f8fe..49dcd9652ec 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -198,6 +198,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
{
struct memtype *new, *entry;
unsigned long actual_type;
+ struct list_head *where;
int err = 0;
BUG_ON(start >= end); /* end is exclusive */
@@ -251,13 +252,12 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
spin_lock(&memtype_lock);
/* Search for existing mapping that overlaps the current range */
+ where = NULL;
list_for_each_entry(entry, &memtype_list, nd) {
struct memtype *saved_ptr;
if (entry->start >= end) {
- dprintk("New Entry\n");
- list_add(&new->nd, entry->nd.prev);
- new = NULL;
+ where = entry->nd.prev;
break;
}
@@ -295,9 +295,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end);
- /* No conflict. Go ahead and add this new entry */
- list_add(&new->nd, saved_ptr->nd.prev);
- new = NULL;
+ where = saved_ptr->nd.prev;
break;
}
@@ -335,9 +333,7 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
dprintk("Overlap at 0x%Lx-0x%Lx\n",
saved_ptr->start, saved_ptr->end);
- /* No conflict. Go ahead and add this new entry */
- list_add(&new->nd, &saved_ptr->nd);
- new = NULL;
+ where = &saved_ptr->nd;
break;
}
}
@@ -354,11 +350,10 @@ int reserve_memtype(u64 start, u64 end, unsigned long req_type,
return err;
}
- if (new) {
- /* No conflict. Not yet added to the list. Add to the tail */
+ if (where)
+ list_add(&new->nd, where);
+ else
list_add_tail(&new->nd, &memtype_list);
- dprintk("New Entry\n");
- }
spin_unlock(&memtype_lock);