get_unmapped_area already cover the offset_in_page() check and returned
with error ptr. So replace offset_in_page() with IS_ERR_VALUE().
Signed-off-by: Gaowei Pu <pugaowei@xxxxxxxxx>
V2: fix compile warnning.
---
mm/mmap.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 7e8c3e8ae75f..6aebfeb6a486 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1430,7 +1430,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr,
* that it represents a valid section of the address space.
*/
addr = get_unmapped_area(file, addr, len, pgoff, flags);
- if (offset_in_page(addr))
+ if (IS_ERR_VALUE(addr))
return addr;
if (flags & MAP_FIXED_NOREPLACE) {
@@ -2990,15 +2990,16 @@ static int do_brk_flags(unsigned long addr, unsigned long len, unsigned long fla
struct rb_node **rb_link, *rb_parent;
pgoff_t pgoff = addr >> PAGE_SHIFT;
int error;
+ unsigned long mapped_addr;
/* Until we need other flags, refuse anything except VM_EXEC. */
if ((flags & (~VM_EXEC)) != 0)
return -EINVAL;
flags |= VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;
- error = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED);
- if (offset_in_page(error))
- return error;
+ mapped_addr = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED);
+ if (IS_ERR_VALUE(mapped_addr))
+ return mapped_addr;
error = mlock_future_check(mm, mm->def_flags, len);
if (error)
--
2.23.0
