mm/vmalloc: use offset_in_page macro

linux/mm.h provides offset_in_page() macro.  Let's use already predefined
macro instead of (addr & ~PAGE_MASK).

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 2faaa2976447a104ac5017ce7f4ad1e52b808b0b..b51b73330f875d953c2a3a86a7b4cadb52026990 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -358,7 +358,7 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
        struct vmap_area *first;
 
        BUG_ON(!size);
-       BUG_ON(size & ~PAGE_MASK);
+       BUG_ON(offset_in_page(size));
        BUG_ON(!is_power_of_2(align));
 
        va = kmalloc_node(sizeof(struct vmap_area),
@@ -936,7 +936,7 @@ static void *vb_alloc(unsigned long size, gfp_t gfp_mask)
        void *vaddr = NULL;
        unsigned int order;
 
-       BUG_ON(size & ~PAGE_MASK);
+       BUG_ON(offset_in_page(size));
        BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
        if (WARN_ON(size == 0)) {
                /*
@@ -989,7 +989,7 @@ static void vb_free(const void *addr, unsigned long size)
        unsigned int order;
        struct vmap_block *vb;
 
-       BUG_ON(size & ~PAGE_MASK);
+       BUG_ON(offset_in_page(size));
        BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC);
 
        flush_cache_vunmap((unsigned long)addr, (unsigned long)addr + size);
@@ -1902,7 +1902,7 @@ static int aligned_vread(char *buf, char *addr, unsigned long count)
        while (count) {
                unsigned long offset, length;
 
-               offset = (unsigned long)addr & ~PAGE_MASK;
+               offset = offset_in_page(addr);
                length = PAGE_SIZE - offset;
                if (length > count)
                        length = count;
@@ -1941,7 +1941,7 @@ static int aligned_vwrite(char *buf, char *addr, unsigned long count)
        while (count) {
                unsigned long offset, length;
 
-               offset = (unsigned long)addr & ~PAGE_MASK;
+               offset = offset_in_page(addr);
                length = PAGE_SIZE - offset;
                if (length > count)
                        length = count;
@@ -2392,7 +2392,7 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
        bool purged = false;
 
        /* verify parameters and allocate data structures */
-       BUG_ON(align & ~PAGE_MASK || !is_power_of_2(align));
+       BUG_ON(offset_in_page(align) || !is_power_of_2(align));
        for (last_area = 0, area = 0; area < nr_vms; area++) {
                start = offsets[area];
                end = start + sizes[area];