[PATCH v2] mm: eliminate "expecting prototype" kernel-doc warnings

[Randy Dunlap]

Fix stray kernel-doc warnings in mm/ due to mis-typed or missing
function names.

Quietens these kernel-doc warnings:

../mm/mmu_gather.c:264: warning: expecting prototype for tlb_gather_mmu(). Prototype was for __tlb_gather_mmu() instead
../mm/oom_kill.c:180: warning: expecting prototype for Check whether unreclaimable slab amount is greater than(). Prototype was for should_dump_unreclaim_slab() instead
../mm/shuffle.c:155: warning: expecting prototype for shuffle_free_memory(). Prototype was for __shuffle_free_memory() instead

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
v2: Move/add kernel-doc in mmu_gather.c. Demote kernel-doc in oom_kill.c
    and shuffle.c to normal comments. (All suggested by Matthew.)

 mm/mmu_gather.c |   29 +++++++++++++++++++----------
 mm/oom_kill.c   |    2 +-
 mm/shuffle.c    |    4 ++--
 3 files changed, 22 insertions(+), 13 deletions(-)

--- linux-next-20210409.orig/mm/mmu_gather.c
+++ linux-next-20210409/mm/mmu_gather.c
@@ -249,16 +249,6 @@ void tlb_flush_mmu(struct mmu_gather *tl
 	tlb_flush_mmu_free(tlb);
 }
 
-/**
- * tlb_gather_mmu - initialize an mmu_gather structure for page-table tear-down
- * @tlb: the mmu_gather structure to initialize
- * @mm: the mm_struct of the target address space
- * @fullmm: @mm is without users and we're going to destroy the full address
- *	    space (exit/execve)
- *
- * Called to initialize an (on-stack) mmu_gather structure for page-table
- * tear-down from @mm.
- */
 static void __tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
 			     bool fullmm)
 {
@@ -283,11 +273,30 @@ static void __tlb_gather_mmu(struct mmu_
 	inc_tlb_flush_pending(tlb->mm);
 }
 
+/**
+ * tlb_gather_mmu - initialize an mmu_gather structure for page-table tear-down
+ * @tlb: the mmu_gather structure to initialize
+ * @mm: the mm_struct of the target address space
+ *
+ * Called to initialize an (on-stack) mmu_gather structure for page-table
+ * tear-down from @mm.
+ */
 void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm)
 {
 	__tlb_gather_mmu(tlb, mm, false);
 }
 
+/**
+ * tlb_gather_mmu_fullmm - initialize an mmu_gather structure for page-table tear-down
+ * @tlb: the mmu_gather structure to initialize
+ * @mm: the mm_struct of the target address space
+ *
+ * In this case, @mm is without users and we're going to destroy the
+ * full address space (exit/execve).
+ *
+ * Called to initialize an (on-stack) mmu_gather structure for page-table
+ * tear-down from @mm.
+ */
 void tlb_gather_mmu_fullmm(struct mmu_gather *tlb, struct mm_struct *mm)
 {
 	__tlb_gather_mmu(tlb, mm, true);
--- linux-next-20210409.orig/mm/oom_kill.c
+++ linux-next-20210409/mm/oom_kill.c
@@ -170,7 +170,7 @@ static bool oom_unkillable_task(struct t
 	return false;
 }
 
-/**
+/*
  * Check whether unreclaimable slab amount is greater than
  * all user memory(LRU pages).
  * dump_unreclaimable_slab() could help in the case that
--- linux-next-20210409.orig/mm/shuffle.c
+++ linux-next-20210409/mm/shuffle.c
@@ -147,8 +147,8 @@ void __meminit __shuffle_zone(struct zon
 	spin_unlock_irqrestore(&z->lock, flags);
 }
 
-/**
- * shuffle_free_memory - reduce the predictability of the page allocator
+/*
+ * __shuffle_free_memory - reduce the predictability of the page allocator
  * @pgdat: node page data
  */
 void __meminit __shuffle_free_memory(pg_data_t *pgdat)