diff options
Diffstat (limited to 'mm/madvise.c')
| -rw-r--r-- | mm/madvise.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 1ccbba5b6674..deff1b64a08c 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -11,8 +11,10 @@ #include <linux/mempolicy.h> #include <linux/page-isolation.h> #include <linux/hugetlb.h> +#include <linux/falloc.h> #include <linux/sched.h> #include <linux/ksm.h> +#include <linux/fs.h> /* * Any behaviour which results in changes to the vma->vm_flags needs to @@ -200,8 +202,7 @@ static long madvise_remove(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end) { - struct address_space *mapping; - loff_t offset, endoff; + loff_t offset; int error; *prev = NULL; /* tell sys_madvise we drop mmap_sem */ @@ -217,16 +218,14 @@ static long madvise_remove(struct vm_area_struct *vma, if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE)) return -EACCES; - mapping = vma->vm_file->f_mapping; - offset = (loff_t)(start - vma->vm_start) + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); - endoff = (loff_t)(end - vma->vm_start - 1) - + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); - /* vmtruncate_range needs to take i_mutex */ + /* filesystem's fallocate may need to take i_mutex */ up_read(¤t->mm->mmap_sem); - error = vmtruncate_range(mapping->host, offset, endoff); + error = do_fallocate(vma->vm_file, + FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, + offset, end - start); down_read(¤t->mm->mmap_sem); return error; } |