From 84bda12af31f930e4200c5244aa111de2485d7b0 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Mon, 2 Mar 2009 18:53:26 +0900
Subject: [PATCH] libata: align ap->sector_buf
ap->sector_buf is used as DMA target and should at least be aligned on
cacheline. This caused problems on some embedded machines.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---
include/linux/libata.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index fbf064e13ad5d..dc18b87ed7224 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -751,7 +751,8 @@ struct ata_port {
acpi_handle acpi_handle;
struct ata_acpi_gtm __acpi_init_gtm; /* use ata_acpi_init_gtm() */
#endif
- u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
+ /* owned by EH */
+ u8 sector_buf[ATA_SECT_SIZE] ____cacheline_aligned;
};
/* The following initializer overrides a method to NULL whether one of
--
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