linux-kernel - [PATCH] mm/doc: Include highmem.h in kernel-doc

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Date:   Thu, 22 Jul 2021 03:18:42 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Subject: [PATCH] mm/doc: Include highmem.h in kernel-doc

There is lots of good documentation in highmem.h that isn't being pulled
into the html documentation.  Fix up a couple of minor glitches and
include it.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 Documentation/core-api/mm-api.rst |  1 +
 include/linux/highmem.h           | 17 +++++++++--------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/Documentation/core-api/mm-api.rst b/Documentation/core-api/mm-api.rst
index 395835f9289f..2027aee5f2d9 100644
--- a/Documentation/core-api/mm-api.rst
+++ b/Documentation/core-api/mm-api.rst
@@ -54,6 +54,7 @@ Virtually Contiguous Mappings
 
 .. kernel-doc:: mm/vmalloc.c
    :export:
+.. kernel-doc:: include/linux/highmem.h
 
 File Mapping and Page Cache
 ===========================
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 861ad00fb32a..fc43e81cf4db 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -37,8 +37,8 @@
 static inline void *kmap(struct page *page);
 
 /**
- * kunmap - Unmap the virtual address mapped by kmap()
- * @addr:	Virtual address to be unmapped
+ * kunmap - Unmap the page mapped by kmap()
+ * @page: Page to be unmapped
  *
  * Counterpart to kmap(). A NOOP for CONFIG_HIGHMEM=n and for mappings of
  * pages in the low memory area.
@@ -69,13 +69,13 @@ static inline void kmap_flush_unused(void);
  *
  * Requires careful handling when nesting multiple mappings because the map
  * management is stack based. The unmap has to be in the reverse order of
- * the map operation:
+ * the map operation::
  *
- * addr1 = kmap_local_page(page1);
- * addr2 = kmap_local_page(page2);
- * ...
- * kunmap_local(addr2);
- * kunmap_local(addr1);
+ *   addr1 = kmap_local_page(page1);
+ *   addr2 = kmap_local_page(page2);
+ *   ...
+ *   kunmap_local(addr2);
+ *   kunmap_local(addr1);
  *
  * Unmapping addr1 before addr2 is invalid and causes malfunction.
  *
@@ -156,6 +156,7 @@ static inline void *kmap_atomic(struct page *page);
  * the side effects of kmap_atomic(), i.e. reenabling pagefaults and
  * preemption.
  */
+static inline void kunmap_atomic(void *addr);
 
 /* Highmem related interfaces for management code */
 static inline unsigned int nr_free_highpages(void);
-- 
2.30.2