[PATCH] gfp_t: infrastructure

Beginning of gfp_t annotations:

 - -Wbitwise added to CHECKFLAGS
 - old __bitwise renamed to __bitwise__
 - __bitwise defined to either __bitwise__ or nothing, depending on
   __CHECK_ENDIAN__ being defined
 - gfp_t switched from __nocast to __bitwise__
 - force cast to gfp_t added to __GFP_... constants
 - new helper - gfp_zone(); extracts zone bits out of gfp_t value and casts
   the result to int

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 5 insertions, 5 deletions

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 37af443eb094..1d5c64df1653 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -700,7 +700,7 @@ static struct zonelist *zonelist_policy(gfp_t gfp, struct mempolicy *policy)
         case MPOL_BIND:
                 /* Lower zones don't get a policy applied */
                 /* Careful: current->mems_allowed might have moved */
-                if ((gfp & GFP_ZONEMASK) >= policy_zone)
+                if (gfp_zone(gfp) >= policy_zone)
                         if (cpuset_zonelist_valid_mems_allowed(policy->v.zonelist))
                                 return policy->v.zonelist;
                 /*FALL THROUGH*/
@@ -712,7 +712,7 @@ static struct zonelist *zonelist_policy(gfp_t gfp, struct mempolicy *policy)
                 nd = 0;
                 BUG();
         }
-        return NODE_DATA(nd)->node_zonelists + (gfp & GFP_ZONEMASK);
+        return NODE_DATA(nd)->node_zonelists + gfp_zone(gfp);
 }
 
 /* Do dynamic interleaving for a process */
@@ -757,7 +757,7 @@ static struct page *alloc_page_interleave(gfp_t gfp, unsigned order, unsigned ni
         struct page *page;
 
         BUG_ON(!node_online(nid));
-        zl = NODE_DATA(nid)->node_zonelists + (gfp & GFP_ZONEMASK);
+        zl = NODE_DATA(nid)->node_zonelists + gfp_zone(gfp);
         page = __alloc_pages(gfp, order, zl);
         if (page && page_zone(page) == zl->zones[0]) {
                 zone_pcp(zl->zones[0],get_cpu())->interleave_hit++;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e1d3d77f4aee..aa43ae3ab8c9 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1089,7 +1089,7 @@ static unsigned int nr_free_zone_pages(int offset)
  */
 unsigned int nr_free_buffer_pages(void)
 {
-        return nr_free_zone_pages(GFP_USER & GFP_ZONEMASK);
+        return nr_free_zone_pages(gfp_zone(GFP_USER));
 }
 
 /*
@@ -1097,7 +1097,7 @@ unsigned int nr_free_buffer_pages(void)
  */
 unsigned int nr_free_pagecache_pages(void)
 {
-        return nr_free_zone_pages(GFP_HIGHUSER & GFP_ZONEMASK);
+        return nr_free_zone_pages(gfp_zone(GFP_HIGHUSER));
 }
 
 #ifdef CONFIG_HIGHMEM