[ARM] 3044/1: Fix sparse warnings about incompatible pointer types for register defin...

Patch from Ian Campbell

The sparse warning initially surfaced in sound/arm/pxa2xx-ac97.c
because it was using u32 * variables to hold the unsigned long *
register addresses.

I submitted an ALSA patch for this http://thread.gmane.org/gmane.linux.alsa.devel/27804 issue and it was suggested that it might be preferable to change the register
definitions to use u32.

Most other subarches seem to use u32 for their register type, at least
the ones which use a __REG macro (like the PXA) do. Nico indicated in
the thread above that he wouldn't mind this patch.

Changing the type required fixes for opposite warnings in the pxa2xx usb
gadget code but that was the only new warning introduced on defconfig
or lubbock, mainstone and our own PXA255 boards.

Signed-off-by: Ian Campbell <icampbell@arcom.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/drivers/usb/gadget/pxa2xx_udc.c b/drivers/usb/gadget/pxa2xx_udc.c
index 73f8c94..feae7c0 100644 (file)
--- a/drivers/usb/gadget/pxa2xx_udc.c
+++ b/drivers/usb/gadget/pxa2xx_udc.c
@@ -422,7 +422,7 @@ static inline void ep0_idle (struct pxa2xx_udc *dev)
 }
 
 static int
-write_packet(volatile unsigned long *uddr, struct pxa2xx_request *req, unsigned max)
+write_packet(volatile u32 *uddr, struct pxa2xx_request *req, unsigned max)
 {
        u8              *buf;
        unsigned        length, count;

diff --git a/drivers/usb/gadget/pxa2xx_udc.h b/drivers/usb/gadget/pxa2xx_udc.h
index a58f3e6..19a883f 100644 (file)
--- a/drivers/usb/gadget/pxa2xx_udc.h
+++ b/drivers/usb/gadget/pxa2xx_udc.h
@@ -69,11 +69,11 @@ struct pxa2xx_ep {
         * UDDR = UDC Endpoint Data Register (the fifo)
         * DRCM = DMA Request Channel Map
         */
-       volatile unsigned long                  *reg_udccs;
-       volatile unsigned long                  *reg_ubcr;
-       volatile unsigned long                  *reg_uddr;
+       volatile u32                            *reg_udccs;
+       volatile u32                            *reg_ubcr;
+       volatile u32                            *reg_uddr;
 #ifdef USE_DMA
-       volatile unsigned long                  *reg_drcmr;
+       volatile u32                    *reg_drcmr;
 #define        drcmr(n)  .reg_drcmr = & DRCMR ## n ,
 #else
 #define        drcmr(n)  

diff --git a/include/asm-arm/arch-pxa/hardware.h b/include/asm-arm/arch-pxa/hardware.h
index cf35721..3e70bd9 100644 (file)
--- a/include/asm-arm/arch-pxa/hardware.h
+++ b/include/asm-arm/arch-pxa/hardware.h
@@ -44,12 +44,12 @@
 
 #ifndef __ASSEMBLY__
 
-# define __REG(x)      (*((volatile unsigned long *)io_p2v(x)))
+# define __REG(x)      (*((volatile u32 *)io_p2v(x)))
 
 /* With indexed regs we don't want to feed the index through io_p2v()
    especially if it is a variable, otherwise horrible code will result. */
 # define __REG2(x,y)   \
-       (*(volatile unsigned long *)((unsigned long)&__REG(x) + (y)))
+       (*(volatile u32 *)((u32)&__REG(x) + (y)))
 
 # define __PREG(x)     (io_v2p((u32)&(x)))