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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2009-05-14 22:44:18 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-06-16 08:44:51 +0400
commit98441973105b80e133fcaa47ebf17be1e024ea30 (patch)
tree87a083ad72dff9b398c9276f5eabf51b6fe17612 /drivers/usb/host/xhci-dbg.c
parent6071d8363b7b284038069f1795a98372fbc1a48e (diff)
downloadlinux-98441973105b80e133fcaa47ebf17be1e024ea30.tar.xz
USB: xhci: Remove packed attribute from structures.
The packed attribute allows gcc to muck with the alignment of data structures, which may lead to byte-wise writes that break atomicity of writes. Packed should only be used when the compile may add undesired padding to the structure. Each element of the structure will be aligned by C based on its size and the size of the elements around it. E.g. a u64 would be aligned on an 8 byte boundary, the next u32 would be aligned on a four byte boundary, etc. Since most of the xHCI structures contain only u32 bit values, removing the packed attribute for them should be harmless. (A future patch will change some of the twin 32-bit address fields to one 64-bit field, but all those places have an even number of 32-bit fields before them, so the alignment should be correct.) Add BUILD_BUG_ON statements to check that the compiler doesn't add padding to the data structures that have a hardware-defined layout. While we're modifying the registers, change the name of intr_reg to xhci_intr_reg to avoid global conflicts. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/xhci-dbg.c')
-rw-r--r--drivers/usb/host/xhci-dbg.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
index 6473cbf329f9..2501c571f855 100644
--- a/drivers/usb/host/xhci-dbg.c
+++ b/drivers/usb/host/xhci-dbg.c
@@ -169,7 +169,7 @@ static void xhci_print_ports(struct xhci_hcd *xhci)
}
}
-void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num)
+void xhci_print_ir_set(struct xhci_hcd *xhci, struct xhci_intr_reg *ir_set, int set_num)
{
void *addr;
u32 temp;