mm/debug_vm_pgtable: update comments regarding migration swap entries

Commit 4dd845b5a3e5 ("mm/swapops: rework swap entry manipulation code")
had changed migtation entry related helpers.  Just update
debug_vm_pgatble() synced documentation to reflect those changes.

Link: https://lkml.kernel.org/r/1641880417-24848-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/vm/arch_pgtable_helpers.rst b/Documentation/vm/arch_pgtable_helpers.rst
index 552567d..b3166c3 100644 (file)
--- a/Documentation/vm/arch_pgtable_helpers.rst
+++ b/Documentation/vm/arch_pgtable_helpers.rst
@@ -247,12 +247,12 @@ SWAP Page Table Helpers
 | __swp_to_pmd_entry        | Creates a mapped PMD from a swapped entry (arch) |
 +---------------------------+--------------------------------------------------+
 | is_migration_entry        | Tests a migration (read or write) swapped entry  |
-+---------------------------+--------------------------------------------------+
-| is_write_migration_entry  | Tests a write migration swapped entry            |
-+---------------------------+--------------------------------------------------+
-| make_migration_entry_read | Converts into read migration swapped entry       |
-+---------------------------+--------------------------------------------------+
-| make_migration_entry      | Creates a migration swapped entry (read or write)|
-+---------------------------+--------------------------------------------------+
++-------------------------------+----------------------------------------------+
+| is_writable_migration_entry   | Tests a write migration swapped entry        |
++-------------------------------+----------------------------------------------+
+| make_readable_migration_entry | Creates a read migration swapped entry       |
++-------------------------------+----------------------------------------------+
+| make_writable_migration_entry | Creates a write migration swapped entry      |
++-------------------------------+----------------------------------------------+
 
 [1] https://lore.kernel.org/linux-mm/20181017020930.GN30832@redhat.com/

diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 228e395..2a2b24e 100644 (file)
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -888,8 +888,8 @@ static void __init swap_migration_tests(struct pgtable_debug_args *args)
        pr_debug("Validating swap migration\n");
 
        /*
-        * make_migration_entry() expects given page to be
-        * locked, otherwise it stumbles upon a BUG_ON().
+        * make_[readable|writable]_migration_entry() expects given page to
+        * be locked, otherwise it stumbles upon a BUG_ON().
         */
        __SetPageLocked(page);
        swp = make_writable_migration_entry(page_to_pfn(page));