Merge branch 'master' into upstream

[pandora-kernel.git] / mm / highmem.c

diff --git a/mm/highmem.c b/mm/highmem.c
index 55885f6..ee5519b 100644 (file)
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -46,6 +46,19 @@ static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
  */
 #ifdef CONFIG_HIGHMEM
 
+unsigned long totalhigh_pages __read_mostly;
+
+unsigned int nr_free_highpages (void)
+{
+       pg_data_t *pgdat;
+       unsigned int pages = 0;
+
+       for_each_online_pgdat(pgdat)
+               pages += pgdat->node_zones[ZONE_HIGHMEM].free_pages;
+
+       return pages;
+}
+
 static int pkmap_count[LAST_PKMAP];
 static unsigned int last_pkmap_nr;
 static  __cacheline_aligned_in_smp DEFINE_SPINLOCK(kmap_lock);
@@ -74,8 +87,7 @@ static void flush_all_zero_pkmaps(void)
                pkmap_count[i] = 0;
 
                /* sanity check */
-               if (pte_none(pkmap_page_table[i]))
-                       BUG();
+               BUG_ON(pte_none(pkmap_page_table[i]));
 
                /*
                 * Don't need an atomic fetch-and-clear op here;
@@ -158,8 +170,7 @@ void fastcall *kmap_high(struct page *page)
        if (!vaddr)
                vaddr = map_new_virtual(page);
        pkmap_count[PKMAP_NR(vaddr)]++;
-       if (pkmap_count[PKMAP_NR(vaddr)] < 2)
-               BUG();
+       BUG_ON(pkmap_count[PKMAP_NR(vaddr)] < 2);
        spin_unlock(&kmap_lock);
        return (void*) vaddr;
 }
@@ -174,8 +185,7 @@ void fastcall kunmap_high(struct page *page)
 
        spin_lock(&kmap_lock);
        vaddr = (unsigned long)page_address(page);
-       if (!vaddr)
-               BUG();
+       BUG_ON(!vaddr);
        nr = PKMAP_NR(vaddr);
 
        /*
@@ -220,8 +230,7 @@ static __init int init_emergency_pool(void)
                return 0;
 
        page_pool = mempool_create_page_pool(POOL_SIZE, 0);
-       if (!page_pool)
-               BUG();
+       BUG_ON(!page_pool);
        printk("highmem bounce pool size: %d pages\n", POOL_SIZE);
 
        return 0;
@@ -264,8 +273,7 @@ int init_emergency_isa_pool(void)
 
        isa_page_pool = mempool_create(ISA_POOL_SIZE, mempool_alloc_pages_isa,
                                       mempool_free_pages, (void *) 0);
-       if (!isa_page_pool)
-               BUG();
+       BUG_ON(!isa_page_pool);
 
        printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
        return 0;
@@ -320,8 +328,8 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
                if (bvec->bv_page == org_vec->bv_page)
                        continue;
 
-               mempool_free(bvec->bv_page, pool);      
-               dec_page_state(nr_bounce);
+               dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
+               mempool_free(bvec->bv_page, pool);
        }
 
        bio_endio(bio_orig, bio_orig->bi_size, err);
@@ -402,7 +410,7 @@ static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
                to->bv_page = mempool_alloc(pool, q->bounce_gfp);
                to->bv_len = from->bv_len;
                to->bv_offset = from->bv_offset;
-               inc_page_state(nr_bounce);
+               inc_zone_page_state(to->bv_page, NR_BOUNCE);
 
                if (rw == WRITE) {
                        char *vto, *vfrom;