The patch titled
Subject: zram: don't pass a bvec to __zram_bvec_write
has been added to the -mm mm-unstable branch. Its filename is
zram-dont-pass-a-bvec-to-__zram_bvec_write.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-dont-pass-a-bvec-to-__zram_bvec_write.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: Christoph Hellwig <hch@xxxxxx>
Subject: zram: don't pass a bvec to __zram_bvec_write
Date: Tue, 11 Apr 2023 19:14:54 +0200
__zram_bvec_write only extracts the page from __zram_bvec_write and always
expects a full page of input. Pass the page directly instead of the bvec
and rename the function to zram_write_page.
Link: https://lkml.kernel.org/r/20230411171459.567614-13-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 14 ++++----------
1 file changed, 4 insertions(+), 10 deletions(-)
--- a/drivers/block/zram/zram_drv.c~zram-dont-pass-a-bvec-to-__zram_bvec_write
+++ a/drivers/block/zram/zram_drv.c
@@ -1443,8 +1443,7 @@ static int zram_bvec_read(struct zram *z
return zram_read_page(zram, bvec->bv_page, index, bio, false);
}
-static int __zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
- u32 index, struct bio *bio)
+static int zram_write_page(struct zram *zram, struct page *page, u32 index)
{
int ret = 0;
unsigned long alloced_pages;
@@ -1452,7 +1451,6 @@ static int __zram_bvec_write(struct zram
unsigned int comp_len = 0;
void *src, *dst, *mem;
struct zcomp_strm *zstrm;
- struct page *page = bvec->bv_page;
unsigned long element = 0;
enum zram_pageflags flags = 0;
@@ -1573,11 +1571,9 @@ out:
static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec,
u32 index, int offset, struct bio *bio)
{
+ struct page *page = bvec->bv_page;
int ret;
- struct page *page = NULL;
- struct bio_vec vec;
- vec = *bvec;
if (is_partial_io(bvec)) {
/*
* This is a partial IO. We need to read the full page
@@ -1592,11 +1588,9 @@ static int zram_bvec_write(struct zram *
goto out;
memcpy_from_bvec(page_address(page) + offset, bvec);
-
- bvec_set_page(&vec, page, PAGE_SIZE, 0);
}
- ret = __zram_bvec_write(zram, &vec, index, bio);
+ ret = zram_write_page(zram, page, index);
out:
if (is_partial_io(bvec))
__free_page(page);
@@ -1711,7 +1705,7 @@ static int zram_recompress(struct zram *
/*
* No direct reclaim (slow path) for handle allocation and no
- * re-compression attempt (unlike in __zram_bvec_write()) since
+ * re-compression attempt (unlike in zram_write_bvec()) since
* we already have stored that object in zsmalloc. If we cannot
* alloc memory for recompressed object then we bail out and
* simply keep the old (existing) object in zsmalloc.
_
Patches currently in -mm which might be from hch@xxxxxx are
zram-always-compile-read_from_bdev_sync.patch
zram-remove-valid_io_request.patch
zram-make-zram_bio_discard-more-self-contained.patch
zram-simplify-bvec-iteration-in-__zram_make_request.patch
zram-move-discard-handling-to-zram_submit_bio.patch
zram-return-early-on-error-in-zram_bvec_rw.patch
zram-refactor-highlevel-read-and-write-handling.patch
zram-dont-use-highmem-for-the-bounce-buffer-in-zram_bvec_readwrite.patch
zram-rename-__zram_bvec_read-to-zram_read_page.patch
zram-directly-call-zram_read_page-in-writeback_store.patch
zram-refactor-zram_bdev_read.patch
zram-dont-pass-a-bvec-to-__zram_bvec_write.patch
zram-refactor-zram_bdev_write.patch
zram-pass-a-page-to-read_from_bdev.patch
zram-dont-return-errors-from-read_from_bdev_async.patch
zram-fix-synchronous-reads.patch
zram-return-errors-from-read_from_bdev_sync.patch
