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authorMatthew Wilcox (Oracle) <willy@infradead.org>2019-09-24 01:34:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 01:54:08 +0300
commita50b854e073cd3335bbbada8dcff83a857297dd7 (patch)
tree2ffc3a1e603860d6c0acc00154b47080c567c9c6 /fs
parent1f18b296699c83d858ca8ebb8b77dbc641d87cae (diff)
downloadlinux-a50b854e073cd3335bbbada8dcff83a857297dd7.tar.xz
mm: introduce page_size()
Patch series "Make working with compound pages easier", v2. These three patches add three helpers and convert the appropriate places to use them. This patch (of 3): It's unnecessarily hard to find out the size of a potentially huge page. Replace 'PAGE_SIZE << compound_order(page)' with page_size(page). Link: http://lkml.kernel.org/r/20190721104612.19120-2-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/io_uring.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 0dadbdbead0f..f83de4c6a826 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3319,7 +3319,7 @@ static int io_uring_mmap(struct file *file, struct vm_area_struct *vma)
}
page = virt_to_head_page(ptr);
- if (sz > (PAGE_SIZE << compound_order(page)))
+ if (sz > page_size(page))
return -EINVAL;
pfn = virt_to_phys(ptr) >> PAGE_SHIFT;