| Message ID | 20230518173403.1150549-6-catalin.marinas@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 | expand |
On Thu, May 18, 2023 at 06:33:53PM +0100, Catalin Marinas wrote: > 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> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/base/devres.c b/drivers/base/devres.c index 5c998cfac335..3df0025d12aa 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 {
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(-)