Commit e2f8f44b authored by Rolf Eike Beer's avatar Rolf Eike Beer Committed by Andrew Morton
Browse files

mm: pagewalk: fix documentation of PTE hole handling 

Empty PTEs are passed to the pte_entry callback, not to pte_hole.

Link: https://lkml.kernel.org/r/3695521.kQq0lBPeGt@devpool047


Signed-off-by: default avatarRolf Eike Beer <eb@emlix.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent e09b0b61

include/linux/pagewalk.h

+5 −5
Original line number Diff line number Diff line
@@ -15,12 +15,12 @@ struct mm_walk; 
 *			this handler is required to be able to handle

 *			pmd_trans_huge() pmds.  They may simply choose to

 *			split_huge_page() instead of handling it explicitly.

 * @pte_entry:		if set, called for each non-empty PTE (lowest-level)

 *			entry

 * @pte_entry:		if set, called for each PTE (lowest-level) entry,

 *			including empty ones

 * @pte_hole:		if set, called for each hole at all levels,

 *			depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD

 *			4:PTE. Any folded depths (where PTRS_PER_P?D is equal

 *			to 1) are skipped.

 *			depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD.

 *			Any folded depths (where PTRS_PER_P?D is equal to 1)

 *			are skipped.

 * @hugetlb_entry:	if set, called for each hugetlb entry

 * @test_walk:		caller specific callback function to determine whether

 *			we walk over the current vma or not. Returning 0 means