The patch titled
Subject: mm/highmem: fix kernel-doc warnings in highmem*.h
has been removed from the -mm tree. Its filename was
mm-highmem-fix-kernel-doc-warnings-in-highmemh.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: "Fabio M. De Francesco" <fmdefrancesco@xxxxxxxxx>
Subject: mm/highmem: fix kernel-doc warnings in highmem*.h
Patch series "Extend and reorganize Highmem's documentation".
This series has the purpose to extend and reorganize Highmem's
documentation.
This is still a work in progress, because some information should still be
moved from highmem.rst to highmem.h and highmem-internal.h. Specifically
I'm talking about moving the "how to" information to the relevant headers,
as it as been suggested by Ira Weiny (Intel).
This patch (of 4):
`scripts/kernel-doc -v -none include/linux/highmem*` reports the following
warnings:
include/linux/highmem.h:160: warning: expecting prototype for kunmap_atomic(). Prototype was for nr_free_highpages() instead
include/linux/highmem.h:204: warning: No description found for return value of 'alloc_zeroed_user_highpage_movable'
include/linux/highmem-internal.h:256: warning: Function parameter or member '__addr' not described in 'kunmap_atomic'
include/linux/highmem-internal.h:256: warning: Excess function parameter 'addr' description in 'kunmap_atomic'
Fix these warnings by (1) moving the kernel-doc comments from highmem.h to
highmem-internal.h (which is the file were the kunmap_atomic() macro is
actually defined), (2) extending and merging it with the comment which was
already in highmem-internal.h, and (3) using correct parameter names.
Link: https://lkml.kernel.org/r/20220421180200.16901-1-fmdefrancesco@xxxxxxxxx
Link: https://lkml.kernel.org/r/20220421180200.16901-2-fmdefrancesco@xxxxxxxxx
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@xxxxxxxxx>
Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/highmem-internal.h | 14 +++++++++++---
include/linux/highmem.h | 15 +++------------
2 files changed, 14 insertions(+), 15 deletions(-)
--- a/include/linux/highmem.h~mm-highmem-fix-kernel-doc-warnings-in-highmemh
+++ a/include/linux/highmem.h
@@ -37,7 +37,7 @@ static inline void *kmap(struct page *pa
/**
* kunmap - Unmap the virtual address mapped by kmap()
- * @addr: Virtual address to be unmapped
+ * @page: Virtual address to be unmapped
*
* Counterpart to kmap(). A NOOP for CONFIG_HIGHMEM=n and for mappings of
* pages in the low memory area.
@@ -145,17 +145,6 @@ static inline void *kmap_local_folio(str
*/
static inline void *kmap_atomic(struct page *page);
-/**
- * kunmap_atomic - Unmap the virtual address mapped by kmap_atomic()
- * @addr: Virtual address to be unmapped
- *
- * Counterpart to kmap_atomic().
- *
- * Effectively a wrapper around kunmap_local() which additionally undoes
- * the side effects of kmap_atomic(), i.e. reenabling pagefaults and
- * preemption.
- */
-
/* Highmem related interfaces for management code */
static inline unsigned int nr_free_highpages(void);
static inline unsigned long totalhigh_pages(void);
@@ -191,6 +180,8 @@ static inline void clear_user_highpage(s
* @vma: The VMA the page is to be allocated for
* @vaddr: The virtual address the page will be inserted into
*
+ * Returns: The allocated and zeroed HIGHMEM page
+ *
* This function will allocate a page for a VMA that the caller knows will
* be able to migrate in the future using move_pages() or reclaimed
*
--- a/include/linux/highmem-internal.h~mm-highmem-fix-kernel-doc-warnings-in-highmemh
+++ a/include/linux/highmem-internal.h
@@ -236,9 +236,17 @@ static inline unsigned long totalhigh_pa
#endif /* CONFIG_HIGHMEM */
-/*
- * Prevent people trying to call kunmap_atomic() as if it were kunmap()
- * kunmap_atomic() should get the return value of kmap_atomic, not the page.
+/**
+ * kunmap_atomic - Unmap the virtual address mapped by kmap_atomic()
+ * @__addr: Virtual address to be unmapped
+ *
+ * Unmap an address previously mapped by kmap_atomic() and re-enables
+ * pagefaults and preemption. Mappings should be unmapped in the reverse
+ * order that they were mapped. See kmap_local_page() for details.
+ * @__addr can be any address within the mapped page, so there is no need
+ * to subtract any offset that has been added. In contrast to kunmap(),
+ * this function takes the address returned from kmap_atomic(), not the
+ * page passed to it. The compiler will warn you if you pass the page.
*/
#define kunmap_atomic(__addr) \
do { \
_
Patches currently in -mm which might be from fmdefrancesco@xxxxxxxxx are
documentation-vm-include-kdocs-from-highmemh-into-highmemrst.patch
documentation-vm-remove-using-kmap-atomic-from-highmemrst.patch
documentation-vm-rework-temporary-virtual-mappings.patch
mm-highmem-vm_bug_on-if-offset-len-page_size.patch
