diff mbox series

[v3,07/13] drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN

Message ID 20221106220143.2129263-8-catalin.marinas@arm.com (mailing list archive)
State New, archived
Headers show
Series mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 | expand

Commit Message

Catalin Marinas Nov. 6, 2022, 10:01 p.m. UTC 
ARCH_DMA_MINALIGN represents the minimum (static) alignment for safe DMA
operations while ARCH_KMALLOC_MINALIGN is the minimum kmalloc() objects
alignment.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
---
 drivers/base/devres.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 4ab2b50ee38f..5dbfa3c31af6 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -29,10 +29,10 @@  struct devres {
 	 * Some archs want to perform DMA into kmalloc caches
 	 * and need a guaranteed alignment larger than
 	 * the alignment of a 64-bit integer.
-	 * Thus we use ARCH_KMALLOC_MINALIGN here and get exactly the same
-	 * buffer alignment as if it was allocated by plain kmalloc().
+	 * Thus we use ARCH_DMA_MINALIGN for data[] which will force the same
+	 * alignment for struct devres when allocated by kmalloc().
 	 */
-	u8 __aligned(ARCH_KMALLOC_MINALIGN) data[];
+	u8 __aligned(ARCH_DMA_MINALIGN) data[];
 };
 
 struct devres_group {