linux-kernel - [PATCH 08/11] powerpc: use generic fixmap.h

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Date:	Tue, 12 Nov 2013 08:22:22 -0500
From:	Mark Salter <msalter@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mark Salter <msalter@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 08/11] powerpc: use generic fixmap.h

Signed-off-by: Mark Salter <msalter@...hat.com>
CC: Benjamin Herrenschmidt <benh@...nel.crashing.org>
CC: Paul Mackerras <paulus@...ba.org>
CC: linuxppc-dev@...ts.ozlabs.org
---
 arch/powerpc/include/asm/fixmap.h | 44 ++-------------------------------------
 1 file changed, 2 insertions(+), 42 deletions(-)

diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index 5c2c023..90f604b 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -58,52 +58,12 @@ enum fixed_addresses {
 extern void __set_fixmap (enum fixed_addresses idx,
 					phys_addr_t phys, pgprot_t flags);
 
-#define set_fixmap(idx, phys) \
-		__set_fixmap(idx, phys, PAGE_KERNEL)
-/*
- * Some hardware wants to get fixmapped without caching.
- */
-#define set_fixmap_nocache(idx, phys) \
-		__set_fixmap(idx, phys, PAGE_KERNEL_NCG)
-
-#define clear_fixmap(idx) \
-		__set_fixmap(idx, 0, __pgprot(0))
-
 #define __FIXADDR_SIZE	(__end_of_fixed_addresses << PAGE_SHIFT)
 #define FIXADDR_START		(FIXADDR_TOP - __FIXADDR_SIZE)
 
-#define __fix_to_virt(x)	(FIXADDR_TOP - ((x) << PAGE_SHIFT))
-#define __virt_to_fix(x)	((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
-
-extern void __this_fixmap_does_not_exist(void);
-
-/*
- * 'index to address' translation. If anyone tries to use the idx
- * directly without tranlation, we catch the bug with a NULL-deference
- * kernel oops. Illegal ranges of incoming indices are caught too.
- */
-static __always_inline unsigned long fix_to_virt(const unsigned int idx)
-{
-	/*
-	 * this branch gets completely eliminated after inlining,
-	 * except when someone tries to use fixaddr indices in an
-	 * illegal way. (such as mixing up address types or using
-	 * out-of-range indices).
-	 *
-	 * If it doesn't get removed, the linker will complain
-	 * loudly with a reasonably clear error message..
-	 */
-	if (idx >= __end_of_fixed_addresses)
-		__this_fixmap_does_not_exist();
-
-        return __fix_to_virt(idx);
-}
+#define FIXMAP_PAGE_NOCACHE PAGE_KERNEL_NCG
 
-static inline unsigned long virt_to_fix(const unsigned long vaddr)
-{
-	BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
-	return __virt_to_fix(vaddr);
-}
+#include <asm-generic/fixmap.h>
 
 #endif /* !__ASSEMBLY__ */
 #endif
-- 
1.8.3.1

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