mm/gup.c: fix follow_page_mask() kerneldoc comment
Commit df06b37ffe
("mm/gup: cache dev_pagemap while pinning pages")
modified the signature of follow_page_mask() but left the parameter
description behind.
Update the description to make the code and comments agree again.
While at it, update formatting of the return value description to match
Documentation/doc-guide/kernel-doc.rst guidelines.
Link: http://lkml.kernel.org/r/1541603316-27832-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
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5040f8df56
commit
78179556e7
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mm/gup.c
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mm/gup.c
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@ -385,11 +385,17 @@ static struct page *follow_p4d_mask(struct vm_area_struct *vma,
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* @vma: vm_area_struct mapping @address
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* @vma: vm_area_struct mapping @address
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* @address: virtual address to look up
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* @address: virtual address to look up
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* @flags: flags modifying lookup behaviour
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* @flags: flags modifying lookup behaviour
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* @page_mask: on output, *page_mask is set according to the size of the page
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* @ctx: contains dev_pagemap for %ZONE_DEVICE memory pinning and a
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* pointer to output page_mask
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*
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*
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* @flags can have FOLL_ flags set, defined in <linux/mm.h>
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* @flags can have FOLL_ flags set, defined in <linux/mm.h>
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*
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*
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* Returns the mapped (struct page *), %NULL if no mapping exists, or
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* When getting pages from ZONE_DEVICE memory, the @ctx->pgmap caches
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* the device's dev_pagemap metadata to avoid repeating expensive lookups.
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*
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* On output, the @ctx->page_mask is set according to the size of the page.
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*
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* Return: the mapped (struct page *), %NULL if no mapping exists, or
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* an error pointer if there is a mapping to something not represented
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* an error pointer if there is a mapping to something not represented
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* by a page descriptor (see also vm_normal_page()).
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* by a page descriptor (see also vm_normal_page()).
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*/
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*/
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