On Wed, 27 Apr 2011, Rabin Vincent wrote: > On Wed, Apr 27, 2011 at 00:21, Alan Stern <st...@rowland.harvard.edu> wrote: > > On Tue, 26 Apr 2011, Rabin Vincent wrote: > >> In my case it's this writel() in ehci-hub.c that gets chopped into > >> strbs: > >> > >> � � � /* force reset to complete */ > >> � � � ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), > >> � � � � � � � � � � � � � � � status_reg); > > > > Why would that get messed up? �The status_reg variable doesn't have any > > __atribute__((packed)) associated with it. > > The initialization of status_reg is: > > u32 __iomem *status_reg > = &ehci->regs->port_status[(wIndex & 0xff) - 1]; > > where ehci->regs is a pointer to the packed struct ehci_regs. So, this > is the same problem of casting pointers to stricter alignment.
Right. I can understand the compiler complaining about the cast to stricter alignment during the initialization. But I don't understand why that would affect the code generated for the writel function. Alan Stern
