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author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:35 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:35 -0800 |
commit | 5ce1a70e2f00f0bce0cab57f798ca354b9496169 (patch) | |
tree | 6e80200536b7a3576fd71ff2c7135ffe87dc858e /mm/util.c | |
parent | 9d3cae26acb471d5954cfdc25d1438b32060babe (diff) | |
parent | ef53d16cded7f89b3843b7a96970dab897843ea5 (diff) | |
download | linux-5ce1a70e2f00f0bce0cab57f798ca354b9496169.tar.bz2 |
Merge branch 'akpm' (more incoming from Andrew)
Merge second patch-bomb from Andrew Morton:
- A little DM fix
- the MM queue
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (154 commits)
ksm: allocate roots when needed
mm: cleanup "swapcache" in do_swap_page
mm,ksm: swapoff might need to copy
mm,ksm: FOLL_MIGRATION do migration_entry_wait
ksm: shrink 32-bit rmap_item back to 32 bytes
ksm: treat unstable nid like in stable tree
ksm: add some comments
tmpfs: fix mempolicy object leaks
tmpfs: fix use-after-free of mempolicy object
mm/fadvise.c: drain all pagevecs if POSIX_FADV_DONTNEED fails to discard all pages
mm: export mmu notifier invalidates
mm: accelerate mm_populate() treatment of THP pages
mm: use long type for page counts in mm_populate() and get_user_pages()
mm: accurately document nr_free_*_pages functions with code comments
HWPOISON: change order of error_states[]'s elements
HWPOISON: fix misjudgement of page_action() for errors on mlocked pages
memcg: stop warning on memcg_propagate_kmem
net: change type of virtio_chan->p9_max_pages
vmscan: change type of vm_total_pages to unsigned long
fs/nfsd: change type of max_delegations, nfsd_drc_max_mem and nfsd_drc_mem_used
...
Diffstat (limited to 'mm/util.c')
-rw-r--r-- | mm/util.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/mm/util.c b/mm/util.c index c55e26b17d93..ab1424dbe2e6 100644 --- a/mm/util.c +++ b/mm/util.c @@ -5,6 +5,8 @@ #include <linux/err.h> #include <linux/sched.h> #include <linux/security.h> +#include <linux/swap.h> +#include <linux/swapops.h> #include <asm/uaccess.h> #include "internal.h" @@ -355,12 +357,16 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr, { unsigned long ret; struct mm_struct *mm = current->mm; + unsigned long populate; ret = security_mmap_file(file, prot, flag); if (!ret) { down_write(&mm->mmap_sem); - ret = do_mmap_pgoff(file, addr, len, prot, flag, pgoff); + ret = do_mmap_pgoff(file, addr, len, prot, flag, pgoff, + &populate); up_write(&mm->mmap_sem); + if (populate) + mm_populate(ret, populate); } return ret; } @@ -378,6 +384,24 @@ unsigned long vm_mmap(struct file *file, unsigned long addr, } EXPORT_SYMBOL(vm_mmap); +struct address_space *page_mapping(struct page *page) +{ + struct address_space *mapping = page->mapping; + + VM_BUG_ON(PageSlab(page)); +#ifdef CONFIG_SWAP + if (unlikely(PageSwapCache(page))) { + swp_entry_t entry; + + entry.val = page_private(page); + mapping = swap_address_space(entry); + } else +#endif + if ((unsigned long)mapping & PAGE_MAPPING_ANON) + mapping = NULL; + return mapping; +} + /* Tracepoints definitions. */ EXPORT_TRACEPOINT_SYMBOL(kmalloc); EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc); |