mm: fix ambiguous comments for better code readability

The parameter of remap_pfn_range() @pfn passed from the caller is actually
a page-frame number converted by corresponding physical address of kernel
memory, the original comment is ambiguous that may mislead the users.

Meanwhile, there is an ambiguous typo "VMM" in the comment of
vm_area_struct.  So fixing them will make the code more readable.

Signed-off-by: chenqiwu <chenqiwu@xiaomi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1583026921-15279-1-git-send-email-qiwuchen55@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index dd555e6d23f370832f018fe6f0c0a56cf150a7f6..4aba6c0c2ba80a8101f9db201ff977aa7cdf3065 100644 (file)
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -289,8 +289,8 @@ struct vm_userfaultfd_ctx {};
 #endif /* CONFIG_USERFAULTFD */
 
 /*
- * This struct defines a memory VMM memory area. There is one of these
- * per VM-area/task.  A VM area is any part of the process virtual memory
+ * This struct describes a virtual memory area. There is one of these
+ * per VM-area/task. A VM area is any part of the process virtual memory
  * space that has a special rule for the page-fault handlers (ie a shared
  * library, the executable area etc).
  */

diff --git a/mm/memory.c b/mm/memory.c
index 8ac9af73e9d2356c1a5f5f675a38de36bf9cb6b1..19874d133a66fc01d7b7d5b0e6c1c923a70d9c0d 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1952,7 +1952,7 @@ static inline int remap_p4d_range(struct mm_struct *mm, pgd_t *pgd,
  * @vma: user vma to map to
  * @addr: target user address to start at
  * @pfn: page frame number of kernel physical memory address
- * @size: size of map area
+ * @size: size of mapping area
  * @prot: page protection flags for this mapping
  *
  * Note: this is only safe if the mm semaphore is held when called.