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>
diff --git a/include/linux/msi.h b/include/linux/msi.h
index d2b8a1e..9c5ce21 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -20,13 +20,13 @@
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;