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authorMatthew Wilcox <willy@linux.intel.com>2009-03-17 15:54:06 +0300
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-03-20 20:48:12 +0300
commit24d27553390c69d11cdbd930d635193956fc295f (patch)
tree1ed673378c02eba46e6f427e1ab2ca06558f9045 /include/linux
parentc41ade2ee1dc146d2de2ee470a87cd6b878a08f4 (diff)
downloadlinux-24d27553390c69d11cdbd930d635193956fc295f.tar.xz
PCI MSI: Replace 'type' with 'is_msix'
By changing from a 5-bit field to a 1-bit field, we free up some bits that can be used by a later patch. Also rearrange the fields for better packing on 64-bit platforms (reducing the size of msi_desc from 72 bytes to 64 bytes). Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/msi.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h
index d2b8a1e8ca11..9c5ce214fbf4 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -20,13 +20,13 @@ extern void write_msi_msg(unsigned int irq, struct msi_msg *msg);
struct msi_desc {
struct {
- __u8 type : 5; /* {0: unused, 5h:MSI, 11h:MSI-X} */
+ __u8 is_msix : 1;
__u8 maskbit : 1; /* mask-pending bit supported ? */
__u8 masked : 1;
__u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */
__u8 pos; /* Location of the msi capability */
- __u32 maskbits_mask; /* mask bits mask */
__u16 entry_nr; /* specific enabled entry */
+ __u32 maskbits_mask; /* mask bits mask */
unsigned default_irq; /* default pre-assigned irq */
}msi_attrib;