Le 24/08/2018 à 13:05, Segher Boessenkool a écrit :
On Fri, Aug 24, 2018 at 10:16:22AM +0000, Christophe Leroy wrote:
_PAGE_NO_CACHE is a target specific flag. Prefer generic functions.
#ifdef CONFIG_PPC
- p->screen_base = __ioremap(addr, 0x200000, _PAGE_NO_CACHE);
+ p->screen_base = ioremap_wc(addr, 0x200000);
#else
But that is not the same. I think you want ioremap_nocache?
No, ioremap_nocache() is _PAGE_NO_CACHE | _PAGE_GUARDED
/arch/powerpc/include/asm/io.h
#define ioremap_nocache(addr, size) ioremap((addr), (size))
/arch/powerpc/mm/pgtable_32.c:
void __iomem *
ioremap_wc(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_NO_CACHE,
__builtin_return_address(0));
}
void __iomem *
ioremap(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED,
__builtin_return_address(0));
}
Christophe
