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authorGaowei Pu <pugaowei@gmail.com>2019-12-01 04:51:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-01 17:29:19 +0300
commitff68dac6d65cd1347dad5d780dd8c90f29dc1b0b (patch)
treea42cd9e6c4796344f7af9a775799867795a0f1bc /mm/mremap.c
parent4e4a9eb921332b9d1edd99f76998f99f36b195f7 (diff)
downloadlinux-ff68dac6d65cd1347dad5d780dd8c90f29dc1b0b.tar.xz
mm/mmap.c: use IS_ERR_VALUE to check return value of get_unmapped_area
get_unmapped_area() returns an address or -errno on failure. Historically we have checked for the failure by offset_in_page() which is correct but quite hard to read. Newer code started using IS_ERR_VALUE which is much easier to read. Convert remaining users of offset_in_page as well. [mhocko@suse.com: rewrite changelog] [mhocko@kernel.org: fix mremap.c and uprobes.c sites also] Link: http://lkml.kernel.org/r/20191012102512.28051-1-pugaowei@gmail.com Signed-off-by: Gaowei Pu <pugaowei@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Yang <richardw.yang@linux.intel.com> Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: "Jérôme Glisse" <jglisse@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Rik van Riel <riel@surriel.com> Cc: Qian Cai <cai@lca.pw> Cc: Shakeel Butt <shakeelb@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mremap.c')
-rw-r--r--mm/mremap.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/mremap.c b/mm/mremap.c
index 1fc8a29fbe3f..122938dcec15 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -558,7 +558,7 @@ static unsigned long mremap_to(unsigned long addr, unsigned long old_len,
ret = get_unmapped_area(vma->vm_file, new_addr, new_len, vma->vm_pgoff +
((addr - vma->vm_start) >> PAGE_SHIFT),
map_flags);
- if (offset_in_page(ret))
+ if (IS_ERR_VALUE(ret))
goto out1;
ret = move_vma(vma, addr, old_len, new_len, new_addr, locked, uf,
@@ -706,7 +706,7 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
vma->vm_pgoff +
((addr - vma->vm_start) >> PAGE_SHIFT),
map_flags);
- if (offset_in_page(new_addr)) {
+ if (IS_ERR_VALUE(new_addr)) {
ret = new_addr;
goto out;
}