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authorWang Wenhu <wenhu.wang@vivo.com>2020-04-01 21:09:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 09:35:30 -0700
commitabd69b9e0010b730259244f9909cff7d8318880f (patch)
treed269f04f9743e8c55443b3c127173fec0d54e14d /mm
parent86a76331d94c4cfa72fe1831dbe4b492f66fdb81 (diff)
downloadlinux-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>
Diffstat (limited to 'mm')
-rw-r--r--mm/memory.c2
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