Merge branch 'akpm' (patches from Andrew)
Merge commit. Changes below are compared with the first parent: b82dde02.
Changes
34 files changed · +493 −171
Only the first 600 diff lines are shown. Download the complete patch.
MAINTAINERS
View filediff --git a/MAINTAINERS b/MAINTAINERS
index b8a717c..fc17185 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10453,9 +10453,11 @@ S: Maintained
F: drivers/net/ethernet/dlink/sundance.c
SUPERH
+M: Yoshinori Sato <[email protected]>
+M: Rich Felker <[email protected]>
Q: http://patchwork.kernel.org/project/linux-sh/list/
-S: Orphan
+S: Maintained
F: Documentation/sh/
F: arch/sh/
F: drivers/sh/
arch/arm/mm/dma-mapping.c
View filediff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 534a60a..0eca381 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1200,10 +1200,7 @@ error:
while (i--)
if (pages[i])
__free_pages(pages[i], 0);
- if (array_size <= PAGE_SIZE)
- kfree(pages);
- else
- vfree(pages);
+ kvfree(pages);
return NULL;
}
@@ -1211,7 +1208,6 @@ static int __iommu_free_buffer(struct device *dev, struct page **pages,
size_t size, struct dma_attrs *attrs)
{
int count = size >> PAGE_SHIFT;
- int array_size = count * sizeof(struct page *);
int i;
if (dma_get_attr(DMA_ATTR_FORCE_CONTIGUOUS, attrs)) {
@@ -1222,10 +1218,7 @@ static int __iommu_free_buffer(struct device *dev, struct page **pages,
__free_pages(pages[i], 0);
}
- if (array_size <= PAGE_SIZE)
- kfree(pages);
- else
- vfree(pages);
+ kvfree(pages);
return 0;
}
arch/x86/include/asm/pmem.h
View filediff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h
index 1544fab..c57fd1e 100644
--- a/arch/x86/include/asm/pmem.h
+++ b/arch/x86/include/asm/pmem.h
@@ -67,18 +67,19 @@ static inline void arch_wmb_pmem(void)
}
/**
- * __arch_wb_cache_pmem - write back a cache range with CLWB
+ * arch_wb_cache_pmem - write back a cache range with CLWB
* @vaddr: virtual start address
* @size: number of bytes to write back
*
* Write back a cache range using the CLWB (cache line write back)
* instruction. This function requires explicit ordering with an
- * arch_wmb_pmem() call. This API is internal to the x86 PMEM implementation.
+ * arch_wmb_pmem() call.
*/
-static inline void __arch_wb_cache_pmem(void *vaddr, size_t size)
+static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size)
{
u16 x86_clflush_size = boot_cpu_data.x86_clflush_size;
unsigned long clflush_mask = x86_clflush_size - 1;
+ void *vaddr = (void __force *)addr;
void *vend = vaddr + size;
void *p;
@@ -115,7 +116,7 @@ static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes,
len = copy_from_iter_nocache(vaddr, bytes, i);
if (__iter_needs_pmem_wb(i))
- __arch_wb_cache_pmem(vaddr, bytes);
+ arch_wb_cache_pmem(addr, bytes);
return len;
}
@@ -133,7 +134,7 @@ static inline void arch_clear_pmem(void __pmem *addr, size_t size)
void *vaddr = (void __force *)addr;
memset(vaddr, 0, size);
- __arch_wb_cache_pmem(vaddr, size);
+ arch_wb_cache_pmem(addr, size);
}
static inline bool __arch_has_wmb_pmem(void)
drivers/acpi/apei/erst.c
View filediff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 6682c5d..6e6bc10 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -32,6 +32,7 @@
#include <linux/hardirq.h>
#include <linux/pstore.h>
#include <linux/vmalloc.h>
+#include <linux/mm.h> /* kvfree() */
#include <acpi/apei.h>
#include "apei-internal.h"
@@ -532,10 +533,7 @@ retry:
return -ENOMEM;
memcpy(new_entries, entries,
erst_record_id_cache.len * sizeof(entries[0]));
- if (erst_record_id_cache.size < PAGE_SIZE)
- kfree(entries);
- else
- vfree(entries);
+ kvfree(entries);
erst_record_id_cache.entries = entries = new_entries;
erst_record_id_cache.size = new_size;
}
drivers/block/drbd/drbd_bitmap.c
View filediff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 0dabc9b..92d6fc0 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -364,12 +364,9 @@ static void bm_free_pages(struct page **pages, unsigned long number)
}
}
-static void bm_vk_free(void *ptr, int v)
+static inline void bm_vk_free(void *ptr)
{
- if (v)
- vfree(ptr);
- else
- kfree(ptr);
+ kvfree(ptr);
}
/*
@@ -379,7 +376,7 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
{
struct page **old_pages = b->bm_pages;
struct page **new_pages, *page;
- unsigned int i, bytes, vmalloced = 0;
+ unsigned int i, bytes;
unsigned long have = b->bm_number_of_pages;
BUG_ON(have == 0 && old_pages != NULL);
@@ -401,7 +398,6 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
PAGE_KERNEL);
if (!new_pages)
return NULL;
- vmalloced = 1;
}
if (want >= have) {
@@ -411,7 +407,7 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
page = alloc_page(GFP_NOIO | __GFP_HIGHMEM);
if (!page) {
bm_free_pages(new_pages + have, i - have);
- bm_vk_free(new_pages, vmalloced);
+ bm_vk_free(new_pages);
return NULL;
}
/* we want to know which page it is
@@ -427,11 +423,6 @@ static struct page **bm_realloc_pages(struct drbd_bitmap *b, unsigned long want)
*/
}
- if (vmalloced)
- b->bm_flags |= BM_P_VMALLOCED;
- else
- b->bm_flags &= ~BM_P_VMALLOCED;
-
return new_pages;
}
@@ -469,7 +460,7 @@ void drbd_bm_cleanup(struct drbd_device *device)
if (!expect(device->bitmap))
return;
bm_free_pages(device->bitmap->bm_pages, device->bitmap->bm_number_of_pages);
- bm_vk_free(device->bitmap->bm_pages, (BM_P_VMALLOCED & device->bitmap->bm_flags));
+ bm_vk_free(device->bitmap->bm_pages);
kfree(device->bitmap);
device->bitmap = NULL;
}
@@ -643,7 +634,6 @@ int drbd_bm_resize(struct drbd_device *device, sector_t capacity, int set_new_bi
unsigned long want, have, onpages; /* number of pages */
struct page **npages, **opages = NULL;
int err = 0, growing;
- int opages_vmalloced;
if (!expect(b))
return -ENOMEM;
@@ -656,8 +646,6 @@ int drbd_bm_resize(struct drbd_device *device, sector_t capacity, int set_new_bi
if (capacity == b->bm_dev_capacity)
goto out;
- opages_vmalloced = (BM_P_VMALLOCED & b->bm_flags);
-
if (capacity == 0) {
spin_lock_irq(&b->bm_lock);
opages = b->bm_pages;
@@ -671,7 +659,7 @@ int drbd_bm_resize(struct drbd_device *device, sector_t capacity, int set_new_bi
b->bm_dev_capacity = 0;
spin_unlock_irq(&b->bm_lock);
bm_free_pages(opages, onpages);
- bm_vk_free(opages, opages_vmalloced);
+ bm_vk_free(opages);
goto out;
}
bits = BM_SECT_TO_BIT(ALIGN(capacity, BM_SECT_PER_BIT));
@@ -744,7 +732,7 @@ int drbd_bm_resize(struct drbd_device *device, sector_t capacity, int set_new_bi
spin_unlock_irq(&b->bm_lock);
if (opages != npages)
- bm_vk_free(opages, opages_vmalloced);
+ bm_vk_free(opages);
if (!growing)
b->bm_set = bm_count_bits(b);
drbd_info(device, "resync bitmap: bits=%lu words=%lu pages=%lu\n", bits, words, want);
drivers/block/drbd/drbd_int.h
View filediff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index b6844fe..34bc84e 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -536,9 +536,6 @@ struct drbd_bitmap; /* opaque for drbd_device */
/* definition of bits in bm_flags to be used in drbd_bm_lock
* and drbd_bitmap_io and friends. */
enum bm_flag {
- /* do we need to kfree, or vfree bm_pages? */
- BM_P_VMALLOCED = 0x10000, /* internal use only, will be masked out */
-
/* currently locked for bulk operation */
BM_LOCKED_MASK = 0xf,
drivers/char/mspec.c
View filediff --git a/drivers/char/mspec.c b/drivers/char/mspec.c
index f1d7fa4..f3f92d5 100644
--- a/drivers/char/mspec.c
+++ b/drivers/char/mspec.c
@@ -93,14 +93,11 @@ struct vma_data {
spinlock_t lock; /* Serialize access to this structure. */
int count; /* Number of pages allocated. */
enum mspec_page_type type; /* Type of pages allocated. */
- int flags; /* See VMD_xxx below. */
unsigned long vm_start; /* Original (unsplit) base. */
unsigned long vm_end; /* Original (unsplit) end. */
unsigned long maddr[0]; /* Array of MSPEC addresses. */
};
-#define VMD_VMALLOCED 0x1 /* vmalloc'd rather than kmalloc'd */
-
/* used on shub2 to clear FOP cache in the HUB */
static unsigned long scratch_page[MAX_NUMNODES];
#define SH2_AMO_CACHE_ENTRIES 4
@@ -185,10 +182,7 @@ mspec_close(struct vm_area_struct *vma)
"failed to zero page %ld\n", my_page);
}
- if (vdata->flags & VMD_VMALLOCED)
- vfree(vdata);
- else
- kfree(vdata);
+ kvfree(vdata);
}
/*
@@ -256,7 +250,7 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
enum mspec_page_type type)
{
struct vma_data *vdata;
- int pages, vdata_size, flags = 0;
+ int pages, vdata_size;
if (vma->vm_pgoff != 0)
return -EINVAL;
@@ -271,16 +265,13 @@ mspec_mmap(struct file *file, struct vm_area_struct *vma,
vdata_size = sizeof(struct vma_data) + pages * sizeof(long);
if (vdata_size <= PAGE_SIZE)
vdata = kzalloc(vdata_size, GFP_KERNEL);
- else {
+ else
vdata = vzalloc(vdata_size);
- flags = VMD_VMALLOCED;
- }
if (!vdata)
return -ENOMEM;
vdata->vm_start = vma->vm_start;
vdata->vm_end = vma->vm_end;
- vdata->flags = flags;
vdata->type = type;
spin_lock_init(&vdata->lock);
atomic_set(&vdata->refcnt, 1);
drivers/gpu/drm/drm_hashtab.c
View filediff --git a/drivers/gpu/drm/drm_hashtab.c b/drivers/gpu/drm/drm_hashtab.c
index c3b80fd..7b30b30 100644
--- a/drivers/gpu/drm/drm_hashtab.c
+++ b/drivers/gpu/drm/drm_hashtab.c
@@ -198,10 +198,7 @@ EXPORT_SYMBOL(drm_ht_remove_item);
void drm_ht_remove(struct drm_open_hash *ht)
{
if (ht->table) {
- if ((PAGE_SIZE / sizeof(*ht->table)) >> ht->order)
- kfree(ht->table);
- else
- vfree(ht->table);
+ kvfree(ht->table);
ht->table = NULL;
}
}
drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
View filediff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
index d6273e1..a80d993 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_private.h
@@ -151,16 +151,12 @@ do { \
#define LIBCFS_FREE(ptr, size) \
do { \
- int s = (size); \
if (unlikely((ptr) == NULL)) { \
CERROR("LIBCFS: free NULL '" #ptr "' (%d bytes) at " \
- "%s:%d\n", s, __FILE__, __LINE__); \
+ "%s:%d\n", (int)(size), __FILE__, __LINE__); \
break; \
} \
- if (unlikely(s > LIBCFS_VMALLOC_SIZE)) \
- vfree(ptr); \
- else \
- kfree(ptr); \
+ kvfree(ptr); \
} while (0)
/******************************************************************************/
fs/block_dev.c
View filediff --git a/fs/block_dev.c b/fs/block_dev.c
index ba762ea..60895e5 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -75,7 +75,7 @@ void kill_bdev(struct block_device *bdev)
{
struct address_space *mapping = bdev->bd_inode->i_mapping;
- if (mapping->nrpages == 0 && mapping->nrshadows == 0)
+ if (mapping->nrpages == 0 && mapping->nrexceptional == 0)
return;
invalidate_bh_lrus();
fs/coda/coda_linux.h
View filediff --git a/fs/coda/coda_linux.h b/fs/coda/coda_linux.h
index f829fe9..5104d84 100644
--- a/fs/coda/coda_linux.h
+++ b/fs/coda/coda_linux.h
@@ -72,8 +72,7 @@ void coda_sysctl_clean(void);
} while (0)
-#define CODA_FREE(ptr,size) \
- do { if (size < PAGE_SIZE) kfree((ptr)); else vfree((ptr)); } while (0)
+#define CODA_FREE(ptr, size) kvfree((ptr))
/* inode to cnode access functions */
fs/dax.c
View filediff --git a/fs/dax.c b/fs/dax.c
index 7af8797..206650f 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -24,6 +24,7 @@
#include <linux/memcontrol.h>
#include <linux/mm.h>
#include <linux/mutex.h>
+#include <linux/pagevec.h>
#include <linux/pmem.h>
#include <linux/sched.h>
#include <linux/uio.h>
@@ -245,6 +246,7 @@ ssize_t dax_do_io(struct kiocb *iocb, struct inode *inode,
loff_t end = pos + iov_iter_count(iter);
memset(&bh, 0, sizeof(bh));
+ bh.b_bdev = inode->i_sb->s_bdev;
if ((flags & DIO_LOCKING) && iov_iter_rw(iter) == READ) {
struct address_space *mapping = inode->i_mapping;
@@ -324,6 +326,199 @@ static int copy_user_bh(struct page *to, struct inode *inode,
return 0;
}
+#define NO_SECTOR -1
+#define DAX_PMD_INDEX(page_index) (page_index & (PMD_MASK >> PAGE_CACHE_SHIFT))
+
+static int dax_radix_entry(struct address_space *mapping, pgoff_t index,
+ sector_t sector, bool pmd_entry, bool dirty)
+{
+ struct radix_tree_root *page_tree = &mapping->page_tree;
+ pgoff_t pmd_index = DAX_PMD_INDEX(index);
+ int type, error = 0;
+ void *entry;
+
+ WARN_ON_ONCE(pmd_entry && !dirty);
+ __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+
+ spin_lock_irq(&mapping->tree_lock);
+
+ entry = radix_tree_lookup(page_tree, pmd_index);
+ if (entry && RADIX_DAX_TYPE(entry) == RADIX_DAX_PMD) {
+ index = pmd_index;
+ goto dirty;
+ }
+
+ entry = radix_tree_lookup(page_tree, index);
+ if (entry) {
+ type = RADIX_DAX_TYPE(entry);
+ if (WARN_ON_ONCE(type != RADIX_DAX_PTE &&
+ type != RADIX_DAX_PMD)) {
+ error = -EIO;
+ goto unlock;
+ }
+
+ if (!pmd_entry || type == RADIX_DAX_PMD)
+ goto dirty;
+
+ /*
+ * We only insert dirty PMD entries into the radix tree. This
+ * means we don't need to worry about removing a dirty PTE
+ * entry and inserting a clean PMD entry, thus reducing the
+ * range we would flush with a follow-up fsync/msync call.
+ */
+ radix_tree_delete(&mapping->page_tree, index);
+ mapping->nrexceptional--;
+ }
+
+ if (sector == NO_SECTOR) {
+ /*
+ * This can happen during correct operation if our pfn_mkwrite
+ * fault raced against a hole punch operation. If this
+ * happens the pte that was hole punched will have been
+ * unmapped and the radix tree entry will have been removed by
+ * the time we are called, but the call will still happen. We
+ * will return all the way up to wp_pfn_shared(), where the
+ * pte_same() check will fail, eventually causing page fault
+ * to be retried by the CPU.
+ */
+ goto unlock;
+ }
+
+ error = radix_tree_insert(page_tree, index,
+ RADIX_DAX_ENTRY(sector, pmd_entry));
+ if (error)
+ goto unlock;
+
+ mapping->nrexceptional++;
+ dirty:
+ if (dirty)
+ radix_tree_tag_set(page_tree, index, PAGECACHE_TAG_DIRTY);
+ unlock:
+ spin_unlock_irq(&mapping->tree_lock);
+ return error;
+}
+
+static int dax_writeback_one(struct block_device *bdev,
+ struct address_space *mapping, pgoff_t index, void *entry)
+{
+ struct radix_tree_root *page_tree = &mapping->page_tree;
+ int type = RADIX_DAX_TYPE(entry);
+ struct radix_tree_node *node;
+ struct blk_dax_ctl dax;
+ void **slot;
+ int ret = 0;
+
+ spin_lock_irq(&mapping->tree_lock);
+ /*
+ * Regular page slots are stabilized by the page lock even
+ * without the tree itself locked. These unlocked entries
+ * need verification under the tree lock.
+ */
+ if (!__radix_tree_lookup(page_tree, index, &node, &slot))
+ goto unlock;
+ if (*slot != entry)
+ goto unlock;
+
+ /* another fsync thread may have already written back this entry */
+ if (!radix_tree_tag_get(page_tree, index, PAGECACHE_TAG_TOWRITE))
+ goto unlock;
+
+ if (WARN_ON_ONCE(type != RADIX_DAX_PTE && type != RADIX_DAX_PMD)) {
+ ret = -EIO;
+ goto unlock;
+ }
+
+ dax.sector = RADIX_DAX_SECTOR(entry);
+ dax.size = (type == RADIX_DAX_PMD ? PMD_SIZE : PAGE_SIZE);
+ spin_unlock_irq(&mapping->tree_lock);
+
+ /*
+ * We cannot hold tree_lock while calling dax_map_atomic() because it
+ * eventually calls cond_resched().
+ */
+ ret = dax_map_atomic(bdev, &dax);
+ if (ret < 0)
+ return ret;
+
+ if (WARN_ON_ONCE(ret < dax.size)) {
+ ret = -EIO;
+ goto unmap;
+ }
+
+ wb_cache_pmem(dax.addr, dax.size);
+
+ spin_lock_irq(&mapping->tree_lock);
+ radix_tree_tag_clear(page_tree, index, PAGECACHE_TAG_TOWRITE);
+ spin_unlock_irq(&mapping->tree_lock);
+ unmap:
+ dax_unmap_atomic(bdev, &dax);
+ return ret;
+
+ unlock:
+ spin_unlock_irq(&mapping->tree_lock);
+ return ret;
+}
+
+/*
+ * Flush the mapping to the persistent domain within the byte range of [start,
+ * end]. This is required by data integrity operations to ensure file data is
+ * on persistent storage prior to completion of the operation.
+ */
+int dax_writeback_mapping_range(struct address_space *mapping, loff_t start,
+ loff_t end)
+{
+ struct inode *inode = mapping->host;
+ struct block_device *bdev = inode->i_sb->s_bdev;
+ pgoff_t start_index, end_index, pmd_index;
+ pgoff_t indices[PAGEVEC_SIZE];
+ struct pagevec pvec;
+ bool done = false;
+ int i, ret = 0;
+ void *entry;
+
+ if (WARN_ON_ONCE(inode->i_blkbits != PAGE_SHIFT))
+ return -EIO;
+
+ start_index = start >> PAGE_CACHE_SHIFT;
+ end_index = end >> PAGE_CACHE_SHIFT;
+ pmd_index = DAX_PMD_INDEX(start_index);
+
+ rcu_read_lock();
+ entry = radix_tree_lookup(&mapping->page_tree, pmd_index);
+ rcu_read_unlock();
+
+ /* see if the start of our range is covered by a PMD entry */
+ if (entry && RADIX_DAX_TYPE(entry) == RADIX_DAX_PMD)
+ start_index = pmd_index;
+
+ tag_pages_for_writeback(mapping, start_index, end_index);
+
+ pagevec_init(&pvec, 0);
+ while (!done) {
+ pvec.nr = find_get_entries_tag(mapping, start_index,
+ PAGECACHE_TAG_TOWRITE, PAGEVEC_SIZE,
+ pvec.pages, indices);
+
+ if (pvec.nr == 0)
+ break;
+
+ for (i = 0; i < pvec.nr; i++) {
+ if (indices[i] > end_index) {
+ done = true;
+ break;
+ }
+
+ ret = dax_writeback_one(bdev, mapping, indices[i],
+ pvec.pages[i]);
+ if (ret < 0)
+ return ret;
+ }
+ }
+ wmb_pmem();
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dax_writeback_mapping_range);
+
static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
struct vm_area_struct *vma, struct vm_fault *vmf)
{
@@ -363,6 +558,11 @@ static int dax_insert_mapping(struct inode *inode, struct buffer_head *bh,
}
dax_unmap_atomic(bdev, &dax);
+ error = dax_radix_entry(mapping, vmf->pgoff, dax.sector, false,
+ vmf->flags & FAULT_FLAG_WRITE);
+ if (error)
+ goto out;
+
error = vm_insert_mixed(vma, vaddr, dax.pfn);
out:
@@ -408,6 +608,7 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf,
memset(&bh, 0, sizeof(bh));
block = (sector_t)vmf->pgoff << (PAGE_SHIFT - blkbits);
+ bh.b_bdev = inode->i_sb->s_bdev;
bh.b_size = PAGE_SIZE;
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fs/ext2/file.c
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fs/ext4/file.c
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fs/inode.c
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fs/jffs2/build.c
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fs/jffs2/fs.c
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fs/jffs2/super.c
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fs/udf/super.c
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fs/xfs/xfs_file.c
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include/linux/dax.h
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include/linux/fs.h
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include/linux/pagemap.h
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include/linux/pmem.h
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include/linux/radix-tree.h
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ipc/sem.c
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ipc/util.c
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ipc/util.h
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mm/filemap.c
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mm/percpu.c
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mm/truncate.c
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mm/vmscan.c
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mm/workingset.c
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net/ipv4/fib_trie.c
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