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| author | WANG Wenhu <wenhu.wang@vivo.com> | 2020-04-01 21:09:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-02 09:35:30 -0700 |
| commit | 86a76331d94c4cfa72fe1831dbe4b492f66fdb81 (patch) | |
| tree | 68bd92ddcc7bb71f902e67104216ab3fbb83a044 /mm/memory.c | |
| parent | 3e69ad081c18d138fc7fd0f1ceef3b055ab10549 (diff) | |
| download | linux-86a76331d94c4cfa72fe1831dbe4b492f66fdb81.tar.gz linux-86a76331d94c4cfa72fe1831dbe4b492f66fdb81.tar.bz2 linux-86a76331d94c4cfa72fe1831dbe4b492f66fdb81.zip | |
mm: clarify a confusing comment for remap_pfn_range()
It really made me scratch my head. Replace the comment with an accurate
and consistent description.
The parameter pfn actually refers to the page frame number which is
right-shifted by PAGE_SHIFT from the physical address.
Signed-off-by: WANG Wenhu <wenhu.wang@vivo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200310073955.43415-1-wenhu.wang@vivo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index e8bfdf0d9d1d..583f84519870 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1939,7 +1939,7 @@ static inline int remap_p4d_range(struct mm_struct *mm, pgd_t *pgd, * remap_pfn_range - remap kernel memory to userspace * @vma: user vma to map to * @addr: target user address to start at - * @pfn: physical address of kernel memory + * @pfn: page frame number of kernel physical memory address * @size: size of map area * @prot: page protection flags for this mapping * |