xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

procfs: new helper - PDE_DATA(inode)

Browse Source 
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>
This commit is contained in:
Al Viro
2013-03-31 18:16:14 -04:00
parent 8510e30b46
commit d9dda78bad
95 changed files with 243 additions and 302 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
arch/powerpc/kernel/proc_powerpc.c
View File

@@ -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;
}