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powerpc/mm: drop ppc_md.iounmap() and __iounmap() 

ppc_md.iounmap() is never set, drop it.

Once ppc_md.iounmap() is gone, iounmap() remains the only user of
__iounmap() and iounmap() does nothing else than calling __iounmap().
So drop iounmap() and make __iounmap() the new iounmap().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/d73ba92bb7a387cc58cc34666d7f5158a45851b0.1566309262.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2019-08-20 14:07:11 +00:00 committed by Michael Ellerman
parent 6f57e6631d
commit 8aee077292
3 changed files with 1 additions and 17 deletions
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5
arch/powerpc/include/asm/io.h
View File

@ -712,9 +712,6 @@ static inline void iosync(void)
* * __ioremap_caller is the same as above but takes an explicit caller
* reference rather than using __builtin_return_address(0)
*
* * __iounmap, is the low level implementation used by iounmap and cannot
* be hooked (but can be used by a hook on iounmap)
*
*/
extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size,
@ -734,8 +731,6 @@ extern void __iomem *__ioremap(phys_addr_t, unsigned long size,
extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size,
pgprot_t prot, void *caller);
extern void __iounmap(volatile void __iomem *addr);
extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
unsigned long size, pgprot_t prot);
extern void __iounmap_at(void *ea, unsigned long size);

2
arch/powerpc/include/asm/machdep.h
View File

@ -33,8 +33,6 @@ struct machdep_calls {
#ifdef CONFIG_PPC64
void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size,
pgprot_t prot, void *caller);
void (*iounmap)(volatile void __iomem *token);
#ifdef CONFIG_PM
void (*iommu_save)(void);
void (*iommu_restore)(void);

11
arch/powerpc/mm/pgtable_64.c
View File

@ -266,7 +266,7 @@ void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
* Unmap an IO region and remove it from imalloc'd list.
* Access to IO memory should be serialized by driver.
*/
void __iounmap(volatile void __iomem *token)
void iounmap(volatile void __iomem *token)
{
void *addr;
@ -283,21 +283,12 @@ void __iounmap(volatile void __iomem *token)
vunmap(addr);
}
void iounmap(volatile void __iomem *token)
{
if (ppc_md.iounmap)
ppc_md.iounmap(token);
else
__iounmap(token);
}
EXPORT_SYMBOL(ioremap);
EXPORT_SYMBOL(ioremap_wc);
EXPORT_SYMBOL(ioremap_prot);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(__ioremap_at);
EXPORT_SYMBOL(iounmap);
EXPORT_SYMBOL(__iounmap);
EXPORT_SYMBOL(__iounmap_at);
#ifndef __PAGETABLE_PUD_FOLDED