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| author | Miklos Szeredi <mszeredi@suse.cz> | 2007-07-15 23:38:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-16 09:05:37 -0700 |
| commit | 0165ab443556bdfad388da6c33d74a71b77d72b2 (patch) | |
| tree | c2449128f60ebed846b7d63633ccee3f88949a1c | |
| parent | c44939ecb6e05aeaaf12d4e1bb046719c97e457e (diff) | |
| download | blackbird-op-linux-0165ab443556bdfad388da6c33d74a71b77d72b2.tar.gz blackbird-op-linux-0165ab443556bdfad388da6c33d74a71b77d72b2.zip | |
split mmap
This is a straightforward split of do_mmap_pgoff() into two functions:
- do_mmap_pgoff() checks the parameters, and calculates the vma
flags. Then it calls
- mmap_region(), which does the actual mapping
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/mm.h | 4 | ||||
| -rw-r--r-- | mm/mmap.c | 25 |
2 files changed, 23 insertions, 6 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index bbd427e8741a..d4ab4e590e23 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1071,6 +1071,10 @@ extern unsigned long get_unmapped_area(struct file *, unsigned long, unsigned lo extern unsigned long do_mmap_pgoff(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flag, unsigned long pgoff); +extern unsigned long mmap_region(struct file *file, unsigned long addr, + unsigned long len, unsigned long flags, + unsigned int vm_flags, unsigned long pgoff, + int accountable); static inline unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, diff --git a/mm/mmap.c b/mm/mmap.c index 9f70c8e8c871..144b4a290f2c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -894,14 +894,11 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, unsigned long flags, unsigned long pgoff) { struct mm_struct * mm = current->mm; - struct vm_area_struct * vma, * prev; struct inode *inode; unsigned int vm_flags; - int correct_wcount = 0; int error; - struct rb_node ** rb_link, * rb_parent; int accountable = 1; - unsigned long charged = 0, reqprot = prot; + unsigned long reqprot = prot; /* * Does the application expect PROT_READ to imply PROT_EXEC? @@ -1027,6 +1024,24 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr, if (error) return error; + return mmap_region(file, addr, len, flags, vm_flags, pgoff, + accountable); +} +EXPORT_SYMBOL(do_mmap_pgoff); + +unsigned long mmap_region(struct file *file, unsigned long addr, + unsigned long len, unsigned long flags, + unsigned int vm_flags, unsigned long pgoff, + int accountable) +{ + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma, *prev; + int correct_wcount = 0; + int error; + struct rb_node **rb_link, *rb_parent; + unsigned long charged = 0; + struct inode *inode = file ? file->f_path.dentry->d_inode : NULL; + /* Clear old maps */ error = -ENOMEM; munmap_back: @@ -1175,8 +1190,6 @@ unacct_error: return error; } -EXPORT_SYMBOL(do_mmap_pgoff); - /* Get an address range which is currently unmapped. * For shmat() with addr=0. * |
