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sparc: iounmap() and *_free_coherent() - Use lookup_resource()

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Replace a custom implementation (which doesn't lock the resource tree) by a
call to lookup_resource()

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geert Uytterhoeven 2011-05-07 20:58:02 +02:00
parent 217bbd8188
commit a0e997c20a
1 changed files with 7 additions and 25 deletions
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32
arch/sparc/kernel/ioport.c
View file

@ -65,9 +65,6 @@ static inline void dma_make_coherent(unsigned long pa, unsigned long len)
} }
#endif #endif
static struct resource *_sparc_find_resource(struct resource *r,
unsigned long);
static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz); static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys, static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
unsigned long size, char *name); unsigned long size, char *name);
@ -143,7 +140,11 @@ void iounmap(volatile void __iomem *virtual)
unsigned long vaddr = (unsigned long) virtual & PAGE_MASK; unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
struct resource *res; struct resource *res;
if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) { /*
* XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
* This probably warrants some sort of hashing.
*/
if ((res = lookup_resource(&sparc_iomap, vaddr)) == NULL) {
printk("free_io/iounmap: cannot free %lx\n", vaddr); printk("free_io/iounmap: cannot free %lx\n", vaddr);
return; return;
} }
@ -319,7 +320,7 @@ static void sbus_free_coherent(struct device *dev, size_t n, void *p,
struct resource *res; struct resource *res;
struct page *pgv; struct page *pgv;
if ((res = _sparc_find_resource(&_sparc_dvma, if ((res = lookup_resource(&_sparc_dvma,
(unsigned long)p)) == NULL) { (unsigned long)p)) == NULL) {
printk("sbus_free_consistent: cannot free %p\n", p); printk("sbus_free_consistent: cannot free %p\n", p);
return; return;
@ -492,7 +493,7 @@ static void pci32_free_coherent(struct device *dev, size_t n, void *p,
{ {
struct resource *res; struct resource *res;
if ((res = _sparc_find_resource(&_sparc_dvma, if ((res = lookup_resource(&_sparc_dvma,
(unsigned long)p)) == NULL) { (unsigned long)p)) == NULL) {
printk("pci_free_consistent: cannot free %p\n", p); printk("pci_free_consistent: cannot free %p\n", p);
return; return;
@ -715,25 +716,6 @@ static const struct file_operations sparc_io_proc_fops = {
}; };
#endif /* CONFIG_PROC_FS */ #endif /* CONFIG_PROC_FS */
/*
* This is a version of find_resource and it belongs to kernel/resource.c.
* Until we have agreement with Linus and Martin, it lingers here.
*
* XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
* This probably warrants some sort of hashing.
*/
static struct resource *_sparc_find_resource(struct resource *root,
unsigned long start)
{
struct resource *tmp;
for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
if (tmp->start == start)
return tmp;
}
return NULL;
}
static void register_proc_sparc_ioport(void) static void register_proc_sparc_ioport(void)
{ {
#ifdef CONFIG_PROC_FS #ifdef CONFIG_PROC_FS