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Documentation: highmem: use literal block for code example in highmem.h comment
When building htmldocs on Linus's tree, there are inline emphasis warnings
on include/linux/highmem.h:
Documentation/vm/highmem:166: ./include/linux/highmem.h:154: WARNING: Inline emphasis start-string without end-string.
Documentation/vm/highmem:166: ./include/linux/highmem.h:157: WARNING: Inline emphasis start-string without end-string.
These warnings above are due to comments in code example at the mentioned
lines above are enclosed by double dash (--), which confuses Sphinx as
inline markup delimiters instead.
Fix these warnings by indenting the code example with literal block
indentation and making the comments C comments.
Link: https://lkml.kernel.org/r/20220622084546.17745-1-bagasdotme@gmail.com
Fixes: 85a85e7601
("Documentation/vm: move "Using kmap-atomic" to highmem.h")
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Ira Weiny <ira.weiny@intel.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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1 changed files with 9 additions and 9 deletions
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@ -149,19 +149,19 @@ static inline void *kmap_local_folio(struct folio *folio, size_t offset);
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* It is used in atomic context when code wants to access the contents of a
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* It is used in atomic context when code wants to access the contents of a
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* page that might be allocated from high memory (see __GFP_HIGHMEM), for
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* page that might be allocated from high memory (see __GFP_HIGHMEM), for
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* example a page in the pagecache. The API has two functions, and they
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* example a page in the pagecache. The API has two functions, and they
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* can be used in a manner similar to the following:
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* can be used in a manner similar to the following::
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*
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*
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* -- Find the page of interest. --
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* // Find the page of interest.
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* struct page *page = find_get_page(mapping, offset);
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* struct page *page = find_get_page(mapping, offset);
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*
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*
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* -- Gain access to the contents of that page. --
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* // Gain access to the contents of that page.
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* void *vaddr = kmap_atomic(page);
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* void *vaddr = kmap_atomic(page);
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*
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*
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* -- Do something to the contents of that page. --
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* // Do something to the contents of that page.
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* memset(vaddr, 0, PAGE_SIZE);
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* memset(vaddr, 0, PAGE_SIZE);
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*
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*
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* -- Unmap that page. --
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* // Unmap that page.
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* kunmap_atomic(vaddr);
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* kunmap_atomic(vaddr);
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*
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*
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* Note that the kunmap_atomic() call takes the result of the kmap_atomic()
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* Note that the kunmap_atomic() call takes the result of the kmap_atomic()
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* call, not the argument.
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* call, not the argument.
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