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IXP4xx: use __iomem for MMIO 

The ixp4xx queue manager uses "const struct qmgr_regs __iomem *" as the
type for a pointer that is passed to __raw_writel, which is not
allowed because of the const-ness.

Dropping the 'const' keyword fixes the problem. While we're here,
let's also drop the useless type cast.

Without this patch, building ixp4xx_defconfig results in:

In file included from arch/arm/mach-ixp4xx/ixp4xx_qmgr.c:15:0:
arch/arm/mach-ixp4xx/include/mach/qmgr.h: In function 'qmgr_put_entry':
arch/arm/mach-ixp4xx/include/mach/qmgr.h:96:2: warning: passing argument 2 of '__raw_writel' discards 'const' qualifier from pointer target type [enabled by default]
arch/arm/include/asm/io.h:88:91: note: expected 'volatile void *' but argument is of type 'const u32 *'
In file included from drivers/net/ethernet/xscale/ixp4xx_eth.c:41:0:
arch/arm/mach-ixp4xx/include/mach/qmgr.h: In function 'qmgr_put_entry':
arch/arm/mach-ixp4xx/include/mach/qmgr.h:96:2: warning: passing argument 2 of '__raw_writel' discards 'const' qualifier from pointer target type [enabled by default]
arch/arm/include/asm/io.h:88:91: note: expected 'volatile void *' but argument is of type 'const u32 *'
arch/arm/mach-ixp4xx/ixp4xx_qmgr.c: In function 'qmgr_set_irq':
arch/arm/mach-ixp4xx/ixp4xx_qmgr.c:41:9: warning: passing argument 2 of '__raw_writel' discards 'const' qualifier from pointer target type [enabled by default]
arch/arm/include/asm/io.h:88:91: note: expected 'volatile void *' but argument is of type 'const u32 *'

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Arnd Bergmann 2012-09-28 23:36:10 +02:00 committed by Jason Cooper
parent b7b23db72f
commit 0d2c9f0517
2 changed files with 8 additions and 8 deletions
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12
arch/arm/mach-ixp4xx/include/mach/qmgr.h
View File

@ -86,7 +86,7 @@ void qmgr_release_queue(unsigned int queue);
static inline void qmgr_put_entry(unsigned int queue, u32 val)
{
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@ -99,7 +99,7 @@ static inline void qmgr_put_entry(unsigned int queue, u32 val)
static inline u32 qmgr_get_entry(unsigned int queue)
{
u32 val;
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
val = __raw_readl(&qmgr_regs->acc[queue][0]);
#if DEBUG_QMGR
BUG_ON(!qmgr_queue_descs[queue]); /* not yet requested */
@ -112,14 +112,14 @@ static inline u32 qmgr_get_entry(unsigned int queue)
static inline int __qmgr_get_stat1(unsigned int queue)
{
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
return (__raw_readl(&qmgr_regs->stat1[queue >> 3])
>> ((queue & 7) << 2)) & 0xF;
}
static inline int __qmgr_get_stat2(unsigned int queue)
{
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
BUG_ON(queue >= HALF_QUEUES);
return (__raw_readl(&qmgr_regs->stat2[queue >> 4])
>> ((queue & 0xF) << 1)) & 0x3;
@ -145,7 +145,7 @@ static inline int qmgr_stat_empty(unsigned int queue)
*/
static inline int qmgr_stat_below_low_watermark(unsigned int queue)
{
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statne_h) >>
(queue - HALF_QUEUES)) & 0x01;
@ -172,7 +172,7 @@ static inline int qmgr_stat_above_high_watermark(unsigned int queue)
*/
static inline int qmgr_stat_full(unsigned int queue)
{
const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
const struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
if (queue >= HALF_QUEUES)
return (__raw_readl(&qmgr_regs->statf_h) >>
(queue - HALF_QUEUES)) & 0x01;

4
arch/arm/mach-ixp4xx/ixp4xx_qmgr.c
View File

@ -14,7 +14,7 @@
#include <linux/module.h>
#include <mach/qmgr.h>
static const struct qmgr_regs __iomem *qmgr_regs = (void __iomem *)IXP4XX_QMGR_BASE_VIRT;
static struct qmgr_regs __iomem *qmgr_regs = IXP4XX_QMGR_BASE_VIRT;
static struct resource *mem_res;
static spinlock_t qmgr_lock;
static u32 used_sram_bitmap[4]; /* 128 16-dword pages */
@ -32,7 +32,7 @@ void qmgr_set_irq(unsigned int queue, int src,
spin_lock_irqsave(&qmgr_lock, flags);
if (queue < HALF_QUEUES) {
const u32 __iomem *reg;
u32 __iomem *reg;
int bit;
BUG_ON(src > QUEUE_IRQ_SRC_NOT_FULL);
reg = &qmgr_regs->irqsrc[queue >> 3]; /* 8 queues per u32 */