The patch titled
Subject: zram: remove entry element member
has been added to the -mm mm-unstable branch. Its filename is
zram-remove-entry-element-member.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-remove-entry-element-member.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Subject: zram: remove entry element member
Date: Tue, 10 Dec 2024 19:53:57 +0900
Element is in the same anon union as handle and hence holds the same
value, which makes code below sort of confusing
handle = zram_get_handle()
if (!handle)
element = zram_get_element()
Element doesn't really simplify the code, let's just remove it. We
already re-purpose handle to store the block id a written back page.
Link: https://lkml.kernel.org/r/20241210105420.1888790-4-senozhatsky@xxxxxxxxxxxx
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 23 +++++------------------
drivers/block/zram/zram_drv.h | 5 +----
2 files changed, 6 insertions(+), 22 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-remove-entry-element-member
+++ a/drivers/block/zram/zram_drv.c
@@ -112,17 +112,6 @@ static void zram_clear_flag(struct zram
zram->table[index].flags &= ~BIT(flag);
}
-static inline void zram_set_element(struct zram *zram, u32 index,
- unsigned long element)
-{
- zram->table[index].element = element;
-}
-
-static unsigned long zram_get_element(struct zram *zram, u32 index)
-{
- return zram->table[index].element;
-}
-
static size_t zram_get_obj_size(struct zram *zram, u32 index)
{
return zram->table[index].flags & (BIT(ZRAM_FLAG_SHIFT) - 1);
@@ -879,7 +868,7 @@ static ssize_t writeback_store(struct de
zram_free_page(zram, index);
zram_set_flag(zram, index, ZRAM_WB);
- zram_set_element(zram, index, blk_idx);
+ zram_set_handle(zram, index, blk_idx);
blk_idx = 0;
atomic64_inc(&zram->stats.pages_stored);
spin_lock(&zram->wb_limit_lock);
@@ -1506,7 +1495,7 @@ static void zram_free_page(struct zram *
if (zram_test_flag(zram, index, ZRAM_WB)) {
zram_clear_flag(zram, index, ZRAM_WB);
- free_block_bdev(zram, zram_get_element(zram, index));
+ free_block_bdev(zram, zram_get_handle(zram, index));
goto out;
}
@@ -1550,12 +1539,10 @@ static int zram_read_from_zspool(struct
handle = zram_get_handle(zram, index);
if (!handle || zram_test_flag(zram, index, ZRAM_SAME)) {
- unsigned long value;
void *mem;
- value = handle ? zram_get_element(zram, index) : 0;
mem = kmap_local_page(page);
- zram_fill_page(mem, PAGE_SIZE, value);
+ zram_fill_page(mem, PAGE_SIZE, handle);
kunmap_local(mem);
return 0;
}
@@ -1601,7 +1588,7 @@ static int zram_read_page(struct zram *z
*/
zram_slot_unlock(zram, index);
- ret = read_from_bdev(zram, page, zram_get_element(zram, index),
+ ret = read_from_bdev(zram, page, zram_get_handle(zram, index),
parent);
}
@@ -1760,7 +1747,7 @@ out:
if (flags) {
zram_set_flag(zram, index, flags);
- zram_set_element(zram, index, element);
+ zram_set_handle(zram, index, element);
} else {
zram_set_handle(zram, index, handle);
zram_set_obj_size(zram, index, comp_len);
--- a/drivers/block/zram/zram_drv.h~zram-remove-entry-element-member
+++ a/drivers/block/zram/zram_drv.h
@@ -62,10 +62,7 @@ enum zram_pageflags {
/* Allocated for each disk page */
struct zram_table_entry {
- union {
- unsigned long handle;
- unsigned long element;
- };
+ unsigned long handle;
unsigned int flags;
spinlock_t lock;
#ifdef CONFIG_ZRAM_TRACK_ENTRY_ACTIME
_
Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are
zram-panic-when-use-ext4-over-zram-fix.patch
zram-cond_resched-in-writeback-loop.patch
zram-free-slot-memory-early-during-write.patch
zram-remove-entry-element-member.patch
zram-factor-out-zram_same-write.patch
zram-factor-out-zram_huge-write.patch
zram-factor-out-different-page-types-read.patch
