diff options
| author | Alexander Kuleshov <kuleshovmail@gmail.com> | 2015-11-05 18:46:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-05 19:34:48 -0800 |
| commit | de1741a1333ea37694dddf7c94aa4cf2d0e58912 (patch) | |
| tree | 3b327e0d452c0f835624c6cee9df0c79003f71f0 | |
| parent | 891c49abfb097bbd7024b4072dd1c8e1c995d3ec (diff) | |
mm/mmap: use offset_in_page macro
linux/mm.h provides offset_in_page() macro. Let's use already predefined
macro instead of (addr & ~PAGE_MASK).
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index bd932c1b130b..3ec19b601be0 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1302,7 +1302,7 @@ 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 (addr & ~PAGE_MASK) + if (offset_in_page(addr)) return addr; /* Do simple checking here so the lower-level routines won't have @@ -1473,7 +1473,7 @@ SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg) if (copy_from_user(&a, arg, sizeof(a))) return -EFAULT; - if (a.offset & ~PAGE_MASK) + if (offset_in_page(a.offset)) return -EINVAL; return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, @@ -1989,7 +1989,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, * can happen with large stack limits and large mmap() * allocations. */ - if (addr & ~PAGE_MASK) { + if (offset_in_page(addr)) { VM_BUG_ON(addr != -ENOMEM); info.flags = 0; info.low_limit = TASK_UNMAPPED_BASE; @@ -2025,7 +2025,7 @@ get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, if (addr > TASK_SIZE - len) return -ENOMEM; - if (addr & ~PAGE_MASK) + if (offset_in_page(addr)) return -EINVAL; addr = arch_rebalance_pgtables(addr, len); @@ -2535,7 +2535,7 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len) unsigned long end; struct vm_area_struct *vma, *prev, *last; - if ((start & ~PAGE_MASK) || start > TASK_SIZE || len > TASK_SIZE-start) + if ((offset_in_page(start)) || start > TASK_SIZE || len > TASK_SIZE-start) return -EINVAL; len = PAGE_ALIGN(len); @@ -2733,7 +2733,7 @@ static unsigned long do_brk(unsigned long addr, unsigned long len) flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags; error = get_unmapped_area(NULL, addr, len, 0, MAP_FIXED); - if (error & ~PAGE_MASK) + if (offset_in_page(error)) return error; error = mlock_future_check(mm, mm->def_flags, len); |