diff options
Diffstat (limited to 'mm/msync.c')
| -rw-r--r-- | mm/msync.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/mm/msync.c b/mm/msync.c index 358d73cf7b7..992a1673d48 100644 --- a/mm/msync.c +++ b/mm/msync.c @@ -12,6 +12,7 @@ #include <linux/mman.h> #include <linux/file.h> #include <linux/syscalls.h> +#include <linux/sched.h> /* * MS_SYNC syncs the entire file - including mappings. @@ -27,7 +28,7 @@ * So by _not_ starting I/O in MS_ASYNC we provide complete flexibility to * applications. */ -asmlinkage long sys_msync(unsigned long start, size_t len, int flags) +SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags) { unsigned long end; struct mm_struct *mm = current->mm; @@ -57,6 +58,7 @@ asmlinkage long sys_msync(unsigned long start, size_t len, int flags) vma = find_vma(mm, start); for (;;) { struct file *file; + loff_t fstart, fend; /* Still start < end. */ error = -ENOMEM; @@ -76,12 +78,18 @@ asmlinkage long sys_msync(unsigned long start, size_t len, int flags) goto out_unlock; } file = vma->vm_file; + fstart = (start - vma->vm_start) + + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); + fend = fstart + (min(end, vma->vm_end) - start) - 1; start = vma->vm_end; if ((flags & MS_SYNC) && file && (vma->vm_flags & VM_SHARED)) { get_file(file); up_read(&mm->mmap_sem); - error = do_fsync(file, 0); + if (vma->vm_flags & VM_NONLINEAR) + error = vfs_fsync(file, 1); + else + error = vfs_fsync_range(file, fstart, fend, 1); fput(file); if (error || start >= end) goto out; |