diff options
| -rw-r--r-- | fs/ramfs/file-nommu.c | 3 | ||||
| -rw-r--r-- | include/linux/mm.h | 4 | ||||
| -rw-r--r-- | mm/internal.h | 12 | ||||
| -rw-r--r-- | mm/nommu.c | 4 | ||||
| -rw-r--r-- | mm/page_alloc.c | 7 | ||||
| -rw-r--r-- | mm/slab.c | 9 |
6 files changed, 11 insertions, 28 deletions
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c index 3f810acd0bfa..b1ca234068f6 100644 --- a/fs/ramfs/file-nommu.c +++ b/fs/ramfs/file-nommu.c @@ -87,8 +87,7 @@ static int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize) xpages = 1UL << order; npages = (newsize + PAGE_SIZE - 1) >> PAGE_SHIFT; - for (loop = 0; loop < npages; loop++) - set_page_count(pages + loop, 1); + split_page(pages, order); /* trim off any pages we don't actually require */ for (loop = npages; loop < xpages; loop++) diff --git a/include/linux/mm.h b/include/linux/mm.h index 9b3cdfc8046d..3d84b7a35e0d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -327,11 +327,7 @@ static inline void get_page(struct page *page) void put_page(struct page *page); -#ifdef CONFIG_MMU void split_page(struct page *page, unsigned int order); -#else -static inline void split_page(struct page *page, unsigned int order) {} -#endif /* * Multiple processes may "see" the same page. E.g. for untouched diff --git a/mm/internal.h b/mm/internal.h index e3042db2a2d6..7bb339779818 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -15,19 +15,7 @@ static inline void set_page_refs(struct page *page, int order) { -#ifdef CONFIG_MMU set_page_count(page, 1); -#else - int i; - - /* - * We need to reference all the pages for this order, otherwise if - * anyone accesses one of the pages with (get/put) it will be freed. - * - eg: access_process_vm() - */ - for (i = 0; i < (1 << order); i++) - set_page_count(page + i, 1); -#endif /* CONFIG_MMU */ } static inline void __put_page(struct page *page) diff --git a/mm/nommu.c b/mm/nommu.c index 4951f4786f28..db45efac17cc 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -159,7 +159,7 @@ void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot) /* * kmalloc doesn't like __GFP_HIGHMEM for some reason */ - return kmalloc(size, gfp_mask & ~__GFP_HIGHMEM); + return kmalloc(size, (gfp_mask | __GFP_COMP) & ~__GFP_HIGHMEM); } struct page * vmalloc_to_page(void *addr) @@ -623,7 +623,7 @@ static int do_mmap_private(struct vm_area_struct *vma, unsigned long len) * - note that this may not return a page-aligned address if the object * we're allocating is smaller than a page */ - base = kmalloc(len, GFP_KERNEL); + base = kmalloc(len, GFP_KERNEL|__GFP_COMP); if (!base) goto enomem; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7aa0181287e1..e197818a7cf6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -422,11 +422,6 @@ static void __free_pages_ok(struct page *page, unsigned int order) mutex_debug_check_no_locks_freed(page_address(page), PAGE_SIZE<<order); -#ifndef CONFIG_MMU - for (i = 1 ; i < (1 << order) ; ++i) - __put_page(page + i); -#endif - for (i = 0 ; i < (1 << order) ; ++i) reserved += free_pages_check(page + i); if (reserved) @@ -746,7 +741,6 @@ static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags) clear_highpage(page + i); } -#ifdef CONFIG_MMU /* * split_page takes a non-compound higher-order page, and splits it into * n (1<<order) sub-pages: page[0..n] @@ -766,7 +760,6 @@ void split_page(struct page *page, unsigned int order) set_page_count(page + i, 1); } } -#endif /* * Really, prep_compound_page() should be called from __rmqueue_bulk(). But diff --git a/mm/slab.c b/mm/slab.c index f477acfb732f..ff0ab772f49d 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -590,6 +590,8 @@ static inline void page_set_cache(struct page *page, struct kmem_cache *cache) static inline struct kmem_cache *page_get_cache(struct page *page) { + if (unlikely(PageCompound(page))) + page = (struct page *)page_private(page); return (struct kmem_cache *)page->lru.next; } @@ -600,6 +602,8 @@ static inline void page_set_slab(struct page *page, struct slab *slab) static inline struct slab *page_get_slab(struct page *page) { + if (unlikely(PageCompound(page))) + page = (struct page *)page_private(page); return (struct slab *)page->lru.prev; } @@ -2412,8 +2416,11 @@ static void set_slab_attr(struct kmem_cache *cachep, struct slab *slabp, struct page *page; /* Nasty!!!!!! I hope this is OK. */ - i = 1 << cachep->gfporder; page = virt_to_page(objp); + + i = 1; + if (likely(!PageCompound(page))) + i <<= cachep->gfporder; do { page_set_cache(page, cachep); page_set_slab(page, slabp); |