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| author | Al Viro <viro@zeniv.linux.org.uk> | 2013-04-01 00:16:14 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-04-09 20:13:32 +0200 |
| commit | d9dda78bad879595d8c4220a067fc029d6484a16 (patch) | |
| tree | 376c47ed566b719009e753e917104b150a639b11 /arch/powerpc/kernel/proc_powerpc.c | |
| parent | last_radio_log: switch to proc_create() (diff) | |
| download | linux-d9dda78bad879595d8c4220a067fc029d6484a16.tar.xz linux-d9dda78bad879595d8c4220a067fc029d6484a16.zip | |
procfs: new helper - PDE_DATA(inode)
The only part of proc_dir_entry the code outside of fs/proc
really cares about is PDE(inode)->data. Provide a helper
for that; static inline for now, eventually will be moved
to fs/proc, along with the knowledge of struct proc_dir_entry
layout.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/powerpc/kernel/proc_powerpc.c')
| -rw-r--r-- | arch/powerpc/kernel/proc_powerpc.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c index f19d0bdc3241..41d8ee9c82f1 100644 --- a/arch/powerpc/kernel/proc_powerpc.c +++ b/arch/powerpc/kernel/proc_powerpc.c @@ -32,8 +32,6 @@ static loff_t page_map_seek( struct file *file, loff_t off, int whence) { loff_t new; - struct proc_dir_entry *dp = PDE(file_inode(file)); - switch(whence) { case 0: new = off; @@ -42,12 +40,12 @@ static loff_t page_map_seek( struct file *file, loff_t off, int whence) new = file->f_pos + off; break; case 2: - new = dp->size + off; + new = PAGE_SIZE + off; break; default: return -EINVAL; } - if ( new < 0 || new > dp->size ) + if ( new < 0 || new > PAGE_SIZE ) return -EINVAL; return (file->f_pos = new); } @@ -55,19 +53,18 @@ static loff_t page_map_seek( struct file *file, loff_t off, int whence) static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) { - struct proc_dir_entry *dp = PDE(file_inode(file)); - return simple_read_from_buffer(buf, nbytes, ppos, dp->data, dp->size); + return simple_read_from_buffer(buf, nbytes, ppos, + PDE_DATA(file_inode(file)), PAGE_SIZE); } static int page_map_mmap( struct file *file, struct vm_area_struct *vma ) { - struct proc_dir_entry *dp = PDE(file_inode(file)); - - if ((vma->vm_end - vma->vm_start) > dp->size) + if ((vma->vm_end - vma->vm_start) > PAGE_SIZE) return -EINVAL; - remap_pfn_range(vma, vma->vm_start, __pa(dp->data) >> PAGE_SHIFT, - dp->size, vma->vm_page_prot); + remap_pfn_range(vma, vma->vm_start, + __pa(PDE_DATA(file_inode(file))) >> PAGE_SHIFT, + PAGE_SIZE, vma->vm_page_prot); return 0; } |