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| author | Wang Wenhu <wenhu.wang@vivo.com> | 2020-04-01 21:09:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-02 09:35:30 -0700 |
| commit | abd69b9e0010b730259244f9909cff7d8318880f (patch) | |
| tree | d269f04f9743e8c55443b3c127173fec0d54e14d | |
| parent | 86a76331d94c4cfa72fe1831dbe4b492f66fdb81 (diff) | |
| download | linux-abd69b9e0010b730259244f9909cff7d8318880f.tar.bz2 | |
mm/memory.c: clarify a confusing comment for vm_iomap_memory
The param "start" actually referes to the physical memory start, which is
to be mapped into virtual area vma. And it is the field vma->vm_start
which stands for the start of the area.
Most of the time, we do not read through whole implementation of a
function but only the definition and essential comments. Accurate
comments are definitely the base stone.
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/20200318052206.105104-1-wenhu.wang@vivo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -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 583f84519870..5c356a57b892 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2009,7 +2009,7 @@ EXPORT_SYMBOL(remap_pfn_range); /** * vm_iomap_memory - remap memory to userspace * @vma: user vma to map to - * @start: start of area + * @start: start of the physical memory to be mapped * @len: size of area * * This is a simplified io_remap_pfn_range() for common driver use. The |