[PATCH 2/3] x86,mm/pat: Cleanup some of the local memtype_rb_* calls

[Davidlohr Bueso]

Cleanup by both getting rid of passing the rb_root down the helper
calls; there is only one. Secondly rename some of the calls from
memtype_rb_ to memtype_interval_.

Signed-off-by: Davidlohr Bueso <dbu...@suse.de>
---
 arch/x86/mm/pat_rbtree.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c
index 1be4d1856a9b..c87fa0e402db 100644
--- a/arch/x86/mm/pat_rbtree.c
+++ b/arch/x86/mm/pat_rbtree.c
@@ -55,12 +55,11 @@ static int is_node_overlap(struct memtype *node, u64 start, 
u64 end)
        return 1;
 }
 
-static struct memtype *memtype_rb_lowest_match(struct rb_root_cached *root,
-                                               u64 start, u64 end)
+static struct memtype *memtype_interval_lowest_match(u64 start, u64 end)
 {
        struct memtype *node;
 
-       node = memtype_interval_iter_first(root, start, end);
+       node = memtype_interval_iter_first(&memtype_rbroot, start, end);
        while (node) {
                if (is_node_overlap(node, start, end))
                        return node;
@@ -76,12 +75,12 @@ enum {
        MEMTYPE_END_MATCH       = 1
 };
 
-static struct memtype *memtype_rb_match(struct rb_root_cached *root,
-                                       u64 start, u64 end, int match_type)
+static struct memtype *memtype_interval_match(u64 start, u64 end,
+                                             int match_type)
 {
        struct memtype *match;
 
-       match = memtype_rb_lowest_match(root, start, end);
+       match = memtype_interval_lowest_match(start, end);
 
        while (match != NULL && match->start < end) {
                if ((match_type == MEMTYPE_EXACT_MATCH) &&
@@ -98,15 +97,14 @@ static struct memtype *memtype_rb_match(struct 
rb_root_cached *root,
        return NULL; /* Returns NULL if there is no match */
 }
 
-static int memtype_rb_check_conflict(struct rb_root_cached *root,
-                                     u64 start, u64 end,
-                                     enum page_cache_mode reqtype,
-                                     enum page_cache_mode *newtype)
+static int memtype_interval_check_conflict(u64 start, u64 end,
+                                          enum page_cache_mode reqtype,
+                                          enum page_cache_mode *newtype)
 {
        struct memtype *match;
        enum page_cache_mode found_type = reqtype;
 
-       match = memtype_rb_lowest_match(root, start, end);
+       match = memtype_interval_lowest_match(start, end);
        if (match == NULL)
                goto success;
 
@@ -146,9 +144,8 @@ int rbt_memtype_check_insert(struct memtype *new,
 {
        int err;
 
-       err =  memtype_rb_check_conflict(&memtype_rbroot,
-                                        new->start, new->end,
-                                        new->type, ret_type);
+       err =  memtype_interval_check_conflict(new->start, new->end,
+                                              new->type, ret_type);
        if (err)
                return err;
 
@@ -170,11 +167,9 @@ struct memtype *rbt_memtype_erase(u64 start, u64 end)
         * it then checks with END_MATCH, i.e. shrink the size of a node
         * from the end for the mremap case.
         */
-       data = memtype_rb_match(&memtype_rbroot, start, end,
-                               MEMTYPE_EXACT_MATCH);
+       data = memtype_interval_match(start, end, MEMTYPE_EXACT_MATCH);
        if (!data) {
-               data = memtype_rb_match(&memtype_rbroot, start, end,
-                                       MEMTYPE_END_MATCH);
+               data = memtype_interval_match(start, end, MEMTYPE_END_MATCH);
                if (!data)
                        return ERR_PTR(-EINVAL);
        }
@@ -196,7 +191,7 @@ struct memtype *rbt_memtype_erase(u64 start, u64 end)
 
 struct memtype *rbt_memtype_lookup(u64 addr)
 {
-       return memtype_rb_lowest_match(&memtype_rbroot, addr, addr + PAGE_SIZE);
+       return memtype_interval_lowest_match(addr, addr + PAGE_SIZE);
 }
 
 #if defined(CONFIG_DEBUG_FS)
-- 
2.16.4