Re: [RFC PATCH 1/2] asm-generic: io: Add exec versions of ioremap
From: Arnd Bergmann <arnd@arndb.de>
Date: 2014-11-26 21:33:03
Also in:
linux-arch, linux-arm-kernel, linux-omap, lkml
On Wednesday 26 November 2014 15:14:00 Dave Gerlach wrote:
quoted hunk ↗ jump to hunk
@@ -66,6 +66,11 @@ extern void ioport_unmap(void __iomem *); #define ioremap_wc ioremap_nocache #endif +#ifndef ARCH_HAS_IOREMAP_EXEC +#define ioremap_exec ioremap +#define ioremap_exec_nocache ioremap_nocache +#endif + #ifdef CONFIG_PCI /* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */ struct pci_dev;
ioremap and ioremap_nocache are the same, and there is no architecture-independent interface to map an MMIO range as cached because a lot of architectures can't do that. Also, I think there are architectures that cannot execute from uncached memory, so I think adding this as a generic API is not a good idea. Arnd