Commit fad1a86e ("procfs: call default get_unmapped_area on MMU-present
architectures"), as its title says, took care of only the MMU case,
leaving the !MMU side still in the regressed state (returning -EIO in
all cases where pde->proc_fops->get_unmapped_area is NULL).
Signed-off-by: Jan Beulich <jbeul...@suse.com>
Cc: HATAYAMA Daisuke <d.hatay...@jp.fujitsu.com>
Cc: Alexey Dobriyan <adobri...@gmail.com>
Cc: David S. Miller <da...@davemloft.net>
---
fs/proc/inode.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
--- 3.13-rc1/fs/proc/inode.c
+++ 3.13-rc1-proc-get-unmapped-area/fs/proc/inode.c
@@ -292,16 +292,19 @@ proc_reg_get_unmapped_area(struct file *
{
struct proc_dir_entry *pde = PDE(file_inode(file));
unsigned long rv = -EIO;
- unsigned long (*get_area)(struct file *, unsigned long, unsigned long,
- unsigned long, unsigned long) = NULL;
+
if (use_pde(pde)) {
+ typeof(proc_reg_get_unmapped_area) *get_area
#ifdef CONFIG_MMU
- get_area = current->mm->get_unmapped_area;
+ = pde->proc_fops->get_unmapped_area
+ ?: current->mm->get_unmapped_area;
+#else
+ = pde->proc_fops->get_unmapped_area;
#endif
- if (pde->proc_fops->get_unmapped_area)
- get_area = pde->proc_fops->get_unmapped_area;
- if (get_area)
- rv = get_area(file, orig_addr, len, pgoff, flags);
+
+ rv = get_area
+ ? get_area(file, orig_addr, len, pgoff, flags)
+ : orig_addr;
unuse_pde(pde);
}
return rv;
--
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