The quilt patch titled
Subject: dmapool: don't memset on free twice
has been removed from the -mm tree. Its filename was
dmapool-dont-memset-on-free-twice.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: Keith Busch <kbusch@xxxxxxxxxx>
Subject: dmapool: don't memset on free twice
Date: Thu, 26 Jan 2023 13:51:23 -0800
If debug is enabled, dmapool will poison the range, so no need to clear it
to 0 immediately before writing over it.
Link: https://lkml.kernel.org/r/20230126215125.4069751-11-kbusch@xxxxxxxx
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Tony Battersby <tonyb@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/dmapool.c~dmapool-dont-memset-on-free-twice
+++ a/mm/dmapool.c
@@ -160,6 +160,8 @@ static void pool_check_block(struct dma_
static bool pool_page_err(struct dma_pool *pool, struct dma_page *page,
void *vaddr, dma_addr_t dma)
{
+ if (want_init_on_free())
+ memset(vaddr, 0, pool->size);
return false;
}
@@ -441,8 +443,6 @@ void dma_pool_free(struct dma_pool *pool
return;
}
- if (want_init_on_free())
- memset(vaddr, 0, pool->size);
if (pool_page_err(pool, page, vaddr, dma)) {
spin_unlock_irqrestore(&pool->lock, flags);
return;
_
Patches currently in -mm which might be from kbusch@xxxxxxxxxx are
