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Merge branch 'akpm' (patches from Andrew)

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Merge misc fixes from Andrew Morton:
 "6 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  sh: add copy_user_page() alias for __copy_user()
  lib/Kconfig: ZLIB_DEFLATE must select BITREVERSE
  mm, dax: fix DAX deadlocks
  memcg: convert threshold to bytes
  builddeb: remove debian/files before build
  mm, fs: obey gfp_mapping for add_to_page_cache()
This commit is contained in:
Linus Torvalds 2015-10-16 11:42:37 -07:00
commit 3d875182d7
12 changed files with 58 additions and 61 deletions
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1
arch/sh/include/asm/page.h
View File

@ -59,6 +59,7 @@ pages_do_alias(unsigned long addr1, unsigned long addr2)
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, void *from);
#define copy_user_page(to, from, vaddr, pg) __copy_user(to, from, PAGE_SIZE)
struct page;
struct vm_area_struct;

2
drivers/staging/lustre/lustre/llite/dir.c
View File

@ -224,7 +224,7 @@ static int ll_dir_filler(void *_hash, struct page *page0)
prefetchw(&page->flags);
ret = add_to_page_cache_lru(page, inode->i_mapping, offset,
GFP_KERNEL);
GFP_NOFS);
if (ret == 0) {
unlock_page(page);
} else {

6
fs/cifs/file.c
View File

@ -3380,6 +3380,7 @@ readpages_get_pages(struct address_space *mapping, struct list_head *page_list,
struct page *page, *tpage;
unsigned int expected_index;
int rc;
gfp_t gfp = GFP_KERNEL & mapping_gfp_mask(mapping);
INIT_LIST_HEAD(tmplist);
@ -3392,7 +3393,7 @@ readpages_get_pages(struct address_space *mapping, struct list_head *page_list,
*/
__set_page_locked(page);
rc = add_to_page_cache_locked(page, mapping,
page->index, GFP_KERNEL);
page->index, gfp);
/* give up if we can't stick it in the cache */
if (rc) {
@ -3418,8 +3419,7 @@ readpages_get_pages(struct address_space *mapping, struct list_head *page_list,
break;
__set_page_locked(page);
if (add_to_page_cache_locked(page, mapping, page->index,
GFP_KERNEL)) {
if (add_to_page_cache_locked(page, mapping, page->index, gfp)) {
__clear_page_locked(page);
break;
}

70
fs/dax.c
View File

@ -285,6 +285,7 @@ static int copy_user_bh(struct page *to, struct buffer_head *bh,
static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct address_space *mapping = inode->i_mapping;
sector_t sector = bh->b_blocknr << (inode->i_blkbits - 9);
unsigned long vaddr = (unsigned long)vmf->virtual_address;
void __pmem *addr;
@ -292,6 +293,8 @@ static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
pgoff_t size;
int error;
i_mmap_lock_read(mapping);
/*
* Check truncate didn't happen while we were allocating a block.
* If it did, this block may or may not be still allocated to the
@ -321,6 +324,8 @@ static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
error = vm_insert_mixed(vma, vaddr, pfn);
out:
i_mmap_unlock_read(mapping);
return error;
}
@ -382,17 +387,15 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
* from a read fault and we've raced with a truncate
*/
error = -EIO;
goto unlock;
goto unlock_page;
}
} else {
i_mmap_lock_write(mapping);
}
error = get_block(inode, block, &bh, 0);
if (!error && (bh.b_size < PAGE_SIZE))
error = -EIO; /* fs corruption? */
if (error)
goto unlock;
goto unlock_page;
if (!buffer_mapped(&bh) && !buffer_unwritten(&bh) && !vmf->cow_page) {
if (vmf->flags & FAULT_FLAG_WRITE) {
@ -403,9 +406,8 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
if (!error && (bh.b_size < PAGE_SIZE))
error = -EIO;
if (error)
goto unlock;
goto unlock_page;
} else {
i_mmap_unlock_write(mapping);
return dax_load_hole(mapping, page, vmf);
}
}
@ -417,15 +419,17 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
else
clear_user_highpage(new_page, vaddr);
if (error)
goto unlock;
goto unlock_page;
vmf->page = page;
if (!page) {
i_mmap_lock_read(mapping);
/* Check we didn't race with truncate */
size = (i_size_read(inode) + PAGE_SIZE - 1) >>
PAGE_SHIFT;
if (vmf->pgoff >= size) {
i_mmap_unlock_read(mapping);
error = -EIO;
goto unlock;
goto out;
}
}
return VM_FAULT_LOCKED;
@ -461,8 +465,6 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
WARN_ON_ONCE(!(vmf->flags & FAULT_FLAG_WRITE));
}
if (!page)
i_mmap_unlock_write(mapping);
out:
if (error == -ENOMEM)
return VM_FAULT_OOM | major;
@ -471,14 +473,11 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
return VM_FAULT_SIGBUS | major;
return VM_FAULT_NOPAGE | major;
unlock:
unlock_page:
if (page) {
unlock_page(page);
page_cache_release(page);
} else {
i_mmap_unlock_write(mapping);
}
goto out;
}
EXPORT_SYMBOL(__dax_fault);
@ -556,10 +555,10 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
block = (sector_t)pgoff << (PAGE_SHIFT - blkbits);
bh.b_size = PMD_SIZE;
i_mmap_lock_write(mapping);
length = get_block(inode, block, &bh, write);
if (length)
return VM_FAULT_SIGBUS;
i_mmap_lock_read(mapping);
/*
* If the filesystem isn't willing to tell us the length of a hole,
@ -569,36 +568,14 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
if (!buffer_size_valid(&bh) || bh.b_size < PMD_SIZE)
goto fallback;
sector = bh.b_blocknr << (blkbits - 9);
if (buffer_unwritten(&bh) || buffer_new(&bh)) {
int i;
length = bdev_direct_access(bh.b_bdev, sector, &kaddr, &pfn,
bh.b_size);
if (length < 0) {
result = VM_FAULT_SIGBUS;
goto out;
}
if ((length < PMD_SIZE) || (pfn & PG_PMD_COLOUR))
goto fallback;
for (i = 0; i < PTRS_PER_PMD; i++)
clear_pmem(kaddr + i * PAGE_SIZE, PAGE_SIZE);
wmb_pmem();
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vma->vm_mm, PGMAJFAULT);
result |= VM_FAULT_MAJOR;
}
/*
* If we allocated new storage, make sure no process has any
* zero pages covering this hole
*/
if (buffer_new(&bh)) {
i_mmap_unlock_write(mapping);
i_mmap_unlock_read(mapping);
unmap_mapping_range(mapping, pgoff << PAGE_SHIFT, PMD_SIZE, 0);
i_mmap_lock_write(mapping);
i_mmap_lock_read(mapping);
}
/*
@ -635,6 +612,7 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
result = VM_FAULT_NOPAGE;
spin_unlock(ptl);
} else {
sector = bh.b_blocknr << (blkbits - 9);
length = bdev_direct_access(bh.b_bdev, sector, &kaddr, &pfn,
bh.b_size);
if (length < 0) {
@ -644,15 +622,25 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address,
if ((length < PMD_SIZE) || (pfn & PG_PMD_COLOUR))
goto fallback;
if (buffer_unwritten(&bh) || buffer_new(&bh)) {
int i;
for (i = 0; i < PTRS_PER_PMD; i++)
clear_pmem(kaddr + i * PAGE_SIZE, PAGE_SIZE);
wmb_pmem();
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vma->vm_mm, PGMAJFAULT);
result |= VM_FAULT_MAJOR;
}
result |= vmf_insert_pfn_pmd(vma, address, pmd, pfn, write);
}
out:
i_mmap_unlock_read(mapping);
if (buffer_unwritten(&bh))
complete_unwritten(&bh, !(result & VM_FAULT_ERROR));
i_mmap_unlock_write(mapping);
return result;
fallback:

4
fs/ext4/readpage.c
View File

@ -165,8 +165,8 @@ int ext4_mpage_readpages(struct address_space *mapping,
if (pages) {
page = list_entry(pages->prev, struct page, lru);
list_del(&page->lru);
if (add_to_page_cache_lru(page, mapping,
page->index, GFP_KERNEL))
if (add_to_page_cache_lru(page, mapping, page->index,
GFP_KERNEL & mapping_gfp_mask(mapping)))
goto next_page;
}

15
fs/mpage.c
View File

@ -139,7 +139,8 @@ map_buffer_to_page(struct page *page, struct buffer_head *bh, int page_block)
static struct bio *
do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages,
sector_t *last_block_in_bio, struct buffer_head *map_bh,
unsigned long *first_logical_block, get_block_t get_block)
unsigned long *first_logical_block, get_block_t get_block,
gfp_t gfp)
{
struct inode *inode = page->mapping->host;
const unsigned blkbits = inode->i_blkbits;
@ -277,8 +278,7 @@ alloc_new:
goto out;
}
bio = mpage_alloc(bdev, blocks[0] << (blkbits - 9),
min_t(int, nr_pages, BIO_MAX_PAGES),
GFP_KERNEL);
min_t(int, nr_pages, BIO_MAX_PAGES), gfp);
if (bio == NULL)
goto confused;
}
@ -361,6 +361,7 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages,
sector_t last_block_in_bio = 0;
struct buffer_head map_bh;
unsigned long first_logical_block = 0;
gfp_t gfp = GFP_KERNEL & mapping_gfp_mask(mapping);
map_bh.b_state = 0;
map_bh.b_size = 0;
@ -370,12 +371,13 @@ mpage_readpages(struct address_space *mapping, struct list_head *pages,
prefetchw(&page->flags);
list_del(&page->lru);
if (!add_to_page_cache_lru(page, mapping,
page->index, GFP_KERNEL)) {
page->index,
gfp)) {
bio = do_mpage_readpage(bio, page,
nr_pages - page_idx,
&last_block_in_bio, &map_bh,
&first_logical_block,
get_block);
get_block, gfp);
}
page_cache_release(page);
}
@ -395,11 +397,12 @@ int mpage_readpage(struct page *page, get_block_t get_block)
sector_t last_block_in_bio = 0;
struct buffer_head map_bh;
unsigned long first_logical_block = 0;
gfp_t gfp = GFP_KERNEL & mapping_gfp_mask(page->mapping);
map_bh.b_state = 0;
map_bh.b_size = 0;
bio = do_mpage_readpage(bio, page, 1, &last_block_in_bio,
&map_bh, &first_logical_block, get_block);
&map_bh, &first_logical_block, get_block, gfp);
if (bio)
mpage_bio_submit(READ, bio);
return 0;

5
fs/ramfs/file-nommu.c
View File

@ -70,6 +70,7 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
unsigned order;
void *data;
int ret;
gfp_t gfp = mapping_gfp_mask(inode->i_mapping);
/* make various checks */
order = get_order(newsize);
@ -84,7 +85,7 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
/* allocate enough contiguous pages to be able to satisfy the
* request */
pages = alloc_pages(mapping_gfp_mask(inode->i_mapping), order);
pages = alloc_pages(gfp, order);
if (!pages)
return -ENOMEM;
@ -108,7 +109,7 @@ int ramfs_nommu_expand_for_mapping(struct inode *inode, size_t newsize)
struct page *page = pages + loop;
ret = add_to_page_cache_lru(page, inode->i_mapping, loop,
GFP_KERNEL);
gfp);
if (ret < 0)
goto add_error;

1
lib/Kconfig
View File

@ -220,6 +220,7 @@ config ZLIB_INFLATE
config ZLIB_DEFLATE
tristate
select BITREVERSE
config LZO_COMPRESS
tristate

1
mm/memcontrol.c
View File

@ -3387,6 +3387,7 @@ static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
ret = page_counter_memparse(args, "-1", &threshold);
if (ret)
return ret;
threshold <<= PAGE_SHIFT;
mutex_lock(&memcg->thresholds_lock);

2
mm/memory.c
View File

@ -2426,6 +2426,8 @@ void unmap_mapping_range(struct address_space *mapping,
if (details.last_index < details.first_index)
details.last_index = ULONG_MAX;
/* DAX uses i_mmap_lock to serialise file truncate vs page fault */
i_mmap_lock_write(mapping);
if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap)))
unmap_mapping_range_tree(&mapping->i_mmap, &details);

8
mm/readahead.c
View File

@ -89,8 +89,8 @@ int read_cache_pages(struct address_space *mapping, struct list_head *pages,
while (!list_empty(pages)) {
page = list_to_page(pages);
list_del(&page->lru);
if (add_to_page_cache_lru(page, mapping,
page->index, GFP_KERNEL)) {
if (add_to_page_cache_lru(page, mapping, page->index,
GFP_KERNEL & mapping_gfp_mask(mapping))) {
read_cache_pages_invalidate_page(mapping, page);
continue;
}
@ -127,8 +127,8 @@ static int read_pages(struct address_space *mapping, struct file *filp,
for (page_idx = 0; page_idx < nr_pages; page_idx++) {
struct page *page = list_to_page(pages);
list_del(&page->lru);
if (!add_to_page_cache_lru(page, mapping,
page->index, GFP_KERNEL)) {
if (!add_to_page_cache_lru(page, mapping, page->index,
GFP_KERNEL & mapping_gfp_mask(mapping))) {
mapping->a_ops->readpage(filp, page);
}
page_cache_release(page);

4
scripts/package/builddeb
View File

@ -115,7 +115,7 @@ esac
BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $KCONFIG_CONFIG || true)"
# Setup the directory structure
rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir"
rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files
mkdir -m 755 -p "$tmpdir/DEBIAN"
mkdir -p "$tmpdir/lib" "$tmpdir/boot"
mkdir -p "$fwdir/lib/firmware/$version/"
@ -408,7 +408,7 @@ binary-arch:
\$(MAKE) KDEB_SOURCENAME=${sourcename} KDEB_PKGVERSION=${packageversion} bindeb-pkg
clean:
rm -rf debian/*tmp
rm -rf debian/*tmp debian/files
mv debian/ debian.backup # debian/ might be cleaned away
\$(MAKE) clean
mv debian.backup debian