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| author | Christoph Hellwig <hch@lst.de> | 2019-08-28 16:19:54 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-09-07 09:28:04 +0200 |
| commit | 7b86ac3371b70c3fd8fd95501719beb1faab719f (patch) | |
| tree | b7f61e4615d249563f09567a22ee399634c898dd /mm/mincore.c | |
| parent | mm: split out a new pagewalk.h header from mm.h (diff) | |
| download | linux-7b86ac3371b70c3fd8fd95501719beb1faab719f.tar.xz linux-7b86ac3371b70c3fd8fd95501719beb1faab719f.zip | |
pagewalk: separate function pointers from iterator data
The mm_walk structure currently mixed data and code. Split out the
operations vectors into a new mm_walk_ops structure, and while we are
changing the API also declare the mm_walk structure inside the
walk_page_range and walk_page_vma functions.
Based on patch from Linus Torvalds.
Link: https://lore.kernel.org/r/20190828141955.22210-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'mm/mincore.c')
| -rw-r--r-- | mm/mincore.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/mm/mincore.c b/mm/mincore.c index 3b051b6ab3fe..f9a9dbe8cd33 100644 --- a/mm/mincore.c +++ b/mm/mincore.c @@ -193,6 +193,12 @@ static inline bool can_do_mincore(struct vm_area_struct *vma) inode_permission(file_inode(vma->vm_file), MAY_WRITE) == 0; } +static const struct mm_walk_ops mincore_walk_ops = { + .pmd_entry = mincore_pte_range, + .pte_hole = mincore_unmapped_range, + .hugetlb_entry = mincore_hugetlb, +}; + /* * Do a chunk of "sys_mincore()". We've already checked * all the arguments, we hold the mmap semaphore: we should @@ -203,12 +209,6 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v struct vm_area_struct *vma; unsigned long end; int err; - struct mm_walk mincore_walk = { - .pmd_entry = mincore_pte_range, - .pte_hole = mincore_unmapped_range, - .hugetlb_entry = mincore_hugetlb, - .private = vec, - }; vma = find_vma(current->mm, addr); if (!vma || addr < vma->vm_start) @@ -219,8 +219,7 @@ static long do_mincore(unsigned long addr, unsigned long pages, unsigned char *v memset(vec, 1, pages); return pages; } - mincore_walk.mm = vma->vm_mm; - err = walk_page_range(addr, end, &mincore_walk); + err = walk_page_range(vma->vm_mm, addr, end, &mincore_walk_ops, vec); if (err < 0) return err; return (end - addr) >> PAGE_SHIFT; |