From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org, willy@infradead.org,
kbusch@kernel.org, hch@lst.de, tonyb@cybernetics.com,
akpm@linux-foundation.org
Subject: [merged mm-stable] dmapool-remove-checks-for-dev-==-null.patch removed from -mm tree
Date: Sun, 26 Feb 2023 15:48:40 -0800 [thread overview]
Message-ID: <20230226234841.8A329C433D2@smtp.kernel.org> (raw)
The quilt patch titled
Subject: dmapool: remove checks for dev == NULL
has been removed from the -mm tree. Its filename was
dmapool-remove-checks-for-dev-==-null.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: Tony Battersby <tonyb@cybernetics.com>
Subject: dmapool: remove checks for dev == NULL
Date: Thu, 26 Jan 2023 13:51:15 -0800
dmapool originally tried to support pools without a device because
dma_alloc_coherent() supports allocations without a device. But nobody
ended up using dma pools without a device, and trying to do so will result
in an oops. So remove the checks for pool->dev == NULL since they are
unneeded bloat.
[kbusch@kernel.org: add check for null dev on create]
Link: https://lkml.kernel.org/r/20230126215125.4069751-3-kbusch@meta.com
Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
--- a/mm/dmapool.c~dmapool-remove-checks-for-dev-==-null
+++ a/mm/dmapool.c
@@ -134,6 +134,9 @@ struct dma_pool *dma_pool_create(const c
size_t allocation;
bool empty = false;
+ if (!dev)
+ return NULL;
+
if (align == 0)
align = 1;
else if (align & (align - 1))
@@ -275,7 +278,7 @@ void dma_pool_destroy(struct dma_pool *p
mutex_lock(&pools_reg_lock);
mutex_lock(&pools_lock);
list_del(&pool->pools);
- if (pool->dev && list_empty(&pool->dev->dma_pools))
+ if (list_empty(&pool->dev->dma_pools))
empty = true;
mutex_unlock(&pools_lock);
if (empty)
@@ -284,12 +287,8 @@ void dma_pool_destroy(struct dma_pool *p
list_for_each_entry_safe(page, tmp, &pool->page_list, page_list) {
if (is_page_busy(page)) {
- if (pool->dev)
- dev_err(pool->dev, "%s %s, %p busy\n", __func__,
- pool->name, page->vaddr);
- else
- pr_err("%s %s, %p busy\n", __func__,
- pool->name, page->vaddr);
+ dev_err(pool->dev, "%s %s, %p busy\n", __func__,
+ pool->name, page->vaddr);
/* leak the still-in-use consistent memory */
list_del(&page->page_list);
kfree(page);
@@ -351,12 +350,8 @@ void *dma_pool_alloc(struct dma_pool *po
for (i = sizeof(page->offset); i < pool->size; i++) {
if (data[i] == POOL_POISON_FREED)
continue;
- if (pool->dev)
- dev_err(pool->dev, "%s %s, %p (corrupted)\n",
- __func__, pool->name, retval);
- else
- pr_err("%s %s, %p (corrupted)\n",
- __func__, pool->name, retval);
+ dev_err(pool->dev, "%s %s, %p (corrupted)\n",
+ __func__, pool->name, retval);
/*
* Dump the first 4 bytes even if they are not
@@ -411,12 +406,8 @@ void dma_pool_free(struct dma_pool *pool
page = pool_find_page(pool, dma);
if (!page) {
spin_unlock_irqrestore(&pool->lock, flags);
- if (pool->dev)
- dev_err(pool->dev, "%s %s, %p/%pad (bad dma)\n",
- __func__, pool->name, vaddr, &dma);
- else
- pr_err("%s %s, %p/%pad (bad dma)\n",
- __func__, pool->name, vaddr, &dma);
+ dev_err(pool->dev, "%s %s, %p/%pad (bad dma)\n",
+ __func__, pool->name, vaddr, &dma);
return;
}
@@ -426,12 +417,8 @@ void dma_pool_free(struct dma_pool *pool
#ifdef DMAPOOL_DEBUG
if ((dma - page->dma) != offset) {
spin_unlock_irqrestore(&pool->lock, flags);
- if (pool->dev)
- dev_err(pool->dev, "%s %s, %p (bad vaddr)/%pad\n",
- __func__, pool->name, vaddr, &dma);
- else
- pr_err("%s %s, %p (bad vaddr)/%pad\n",
- __func__, pool->name, vaddr, &dma);
+ dev_err(pool->dev, "%s %s, %p (bad vaddr)/%pad\n",
+ __func__, pool->name, vaddr, &dma);
return;
}
{
@@ -442,12 +429,8 @@ void dma_pool_free(struct dma_pool *pool
continue;
}
spin_unlock_irqrestore(&pool->lock, flags);
- if (pool->dev)
- dev_err(pool->dev, "%s %s, dma %pad already free\n",
- __func__, pool->name, &dma);
- else
- pr_err("%s %s, dma %pad already free\n",
- __func__, pool->name, &dma);
+ dev_err(pool->dev, "%s %s, dma %pad already free\n",
+ __func__, pool->name, &dma);
return;
}
}
_
Patches currently in -mm which might be from tonyb@cybernetics.com are
next reply other threads:[~2023-02-26 23:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-26 23:48 Andrew Morton [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-04-06 2:44 [merged mm-stable] dmapool-remove-checks-for-dev-==-null.patch removed from -mm tree Andrew Morton
2023-05-05 22:38 Andrew Morton
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