The quilt patch titled
Subject: lib/stackdepot: simplify __stack_depot_save
has been removed from the -mm tree. Its filename was
lib-stackdepot-simplify-__stack_depot_save.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: lib/stackdepot: simplify __stack_depot_save
Date: Mon, 20 Nov 2023 18:47:01 +0100
The retval local variable in __stack_depot_save has the union type
handle_parts, but the function never uses anything but the union's handle
field.
Define retval simply as depot_stack_handle_t to simplify the code.
Link: https://lkml.kernel.org/r/3b0763c8057a1cf2f200ff250a5f9580ee36a28c.1700502145.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/stackdepot.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/lib/stackdepot.c~lib-stackdepot-simplify-__stack_depot_save
+++ a/lib/stackdepot.c
@@ -366,7 +366,7 @@ depot_stack_handle_t __stack_depot_save(
gfp_t alloc_flags, bool can_alloc)
{
struct stack_record *found = NULL, **bucket;
- union handle_parts retval = { .handle = 0 };
+ depot_stack_handle_t handle = 0;
struct page *page = NULL;
void *prealloc = NULL;
unsigned long flags;
@@ -383,7 +383,7 @@ depot_stack_handle_t __stack_depot_save(
nr_entries = filter_irq_stacks(entries, nr_entries);
if (unlikely(nr_entries == 0) || stack_depot_disabled)
- goto fast_exit;
+ return 0;
hash = hash_stack(entries, nr_entries);
bucket = &stack_table[hash & stack_hash_mask];
@@ -449,9 +449,8 @@ exit:
free_pages((unsigned long)prealloc, DEPOT_POOL_ORDER);
}
if (found)
- retval.handle = found->handle.handle;
-fast_exit:
- return retval.handle;
+ handle = found->handle.handle;
+ return handle;
}
EXPORT_SYMBOL_GPL(__stack_depot_save);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
