[PATCH 20/20] arch: remove ioremap_wt, optionally replace with arch_memremap
From: Dan Williams
Date: Fri Oct 09 2015 - 18:23:52 EST
Now that all call sites for ioremap_wt() have been converted to
memremap(MEMREMAP_WT) we can now proceed with removing the
implementation in the archs. This amounts to replacing the per-arch
ioremap_wt() implementation with arch_memremap in the case where
ioremap_wt() was actually providing "writethrough" semantics.
Otherwise, ioremap_wt() support that falls back to ioremap() is simply
removed.
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
Documentation/x86/pat.txt | 2 +-
arch/arc/include/asm/io.h | 1 -
arch/arm/include/asm/io.h | 2 --
arch/arm64/include/asm/io.h | 1 -
arch/avr32/include/asm/io.h | 1 -
arch/frv/include/asm/io.h | 7 -------
arch/m32r/include/asm/io.h | 1 -
arch/m68k/include/asm/io_mm.h | 7 -------
arch/m68k/include/asm/io_no.h | 6 ------
arch/m68k/include/asm/raw_io.h | 1 -
arch/metag/include/asm/io.h | 3 ---
arch/microblaze/include/asm/io.h | 1 -
arch/mn10300/include/asm/io.h | 1 -
arch/nios2/include/asm/io.h | 1 -
arch/s390/include/asm/io.h | 1 -
arch/sparc/include/asm/io_32.h | 1 -
arch/sparc/include/asm/io_64.h | 1 -
arch/tile/include/asm/io.h | 1 -
arch/x86/include/asm/io.h | 2 --
arch/x86/mm/ioremap.c | 17 -----------------
arch/xtensa/include/asm/io.h | 1 -
drivers/video/fbdev/Kconfig | 2 +-
include/asm-generic/io.h | 8 --------
include/asm-generic/iomap.h | 4 ----
24 files changed, 2 insertions(+), 71 deletions(-)
diff --git a/Documentation/x86/pat.txt b/Documentation/x86/pat.txt
index 73d3635f6a3f..7e0e43c648f7 100644
--- a/Documentation/x86/pat.txt
+++ b/Documentation/x86/pat.txt
@@ -40,7 +40,7 @@ ioremap_wc | -- | -- | WC |
| | | |
memremap(MEMREMAP_WB) | WB | WB | WB |
| | | |
-ioremap_wt | -- | -- | WT |
+memremap(MEMREMAP_WT) | -- | -- | WT |
| | | |
set_memory_uc | UC- | -- | -- |
set_memory_wb | | | |
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
index 694ece8a0243..00f97a2f5fa6 100644
--- a/arch/arc/include/asm/io.h
+++ b/arch/arc/include/asm/io.h
@@ -20,7 +20,6 @@ extern void iounmap(const void __iomem *addr);
#define ioremap_nocache(phy, sz) ioremap(phy, sz)
#define ioremap_wc(phy, sz) ioremap(phy, sz)
-#define ioremap_wt(phy, sz) ioremap(phy, sz)
/* Change struct page to physical address */
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 191d0f6eeead..5616c4f4304d 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h
@@ -357,7 +357,6 @@ static inline void memcpy_toio(volatile void __iomem *to, const void *from,
* ioremap_nocache() Device n/a n/a
* memremap(WB) Normal Writeback Read allocate
* ioremap_wc() Normal Non-cacheable n/a
- * ioremap_wt() Normal Non-cacheable n/a
*
* All device mappings have the following properties:
* - no access speculation
@@ -394,7 +393,6 @@ void __iomem *ioremap(resource_size_t res_cookie, size_t size);
void __iomem *ioremap_wc(resource_size_t res_cookie, size_t size);
#define ioremap_wc ioremap_wc
-#define ioremap_wt ioremap_wc
void iounmap(volatile void __iomem *iomem_cookie);
#define iounmap iounmap
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 51376353a722..054fb4def2c9 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -169,7 +169,6 @@ extern void __iounmap(volatile void __iomem *addr);
#define ioremap(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
#define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
#define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
-#define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
#define iounmap __iounmap
/*
diff --git a/arch/avr32/include/asm/io.h b/arch/avr32/include/asm/io.h
index f855646e0db7..1f8ca9bde930 100644
--- a/arch/avr32/include/asm/io.h
+++ b/arch/avr32/include/asm/io.h
@@ -296,7 +296,6 @@ extern void __iounmap(void __iomem *addr);
__iounmap(addr)
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
#define ioremap_uc ioremap_nocache
#define cached(addr) P1SEGADDR(addr)
diff --git a/arch/frv/include/asm/io.h b/arch/frv/include/asm/io.h
index 2b6ff56a2d2f..afc14a071582 100644
--- a/arch/frv/include/asm/io.h
+++ b/arch/frv/include/asm/io.h
@@ -17,8 +17,6 @@
#ifdef __KERNEL__
-#define ARCH_HAS_IOREMAP_WT
-
#include <linux/types.h>
#include <asm/virtconvert.h>
#include <asm/string.h>
@@ -267,11 +265,6 @@ static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned lon
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
-static inline void __iomem *ioremap_wt(unsigned long physaddr, unsigned long size)
-{
- return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
-}
-
#define ioremap_wc ioremap_nocache
#define ioremap_uc ioremap_nocache
diff --git a/arch/m32r/include/asm/io.h b/arch/m32r/include/asm/io.h
index 61b8931bc192..c458307a36ad 100644
--- a/arch/m32r/include/asm/io.h
+++ b/arch/m32r/include/asm/io.h
@@ -68,7 +68,6 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
extern void iounmap(volatile void __iomem *addr);
#define ioremap_nocache(off,size) ioremap(off,size)
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
#define ioremap_uc ioremap_nocache
/*
diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h
index 89361b7bfafc..99cca82cb10c 100644
--- a/arch/m68k/include/asm/io_mm.h
+++ b/arch/m68k/include/asm/io_mm.h
@@ -20,8 +20,6 @@
#ifdef __KERNEL__
-#define ARCH_HAS_IOREMAP_WT
-
#include <linux/compiler.h>
#include <asm/raw_io.h>
#include <asm/virtconvert.h>
@@ -469,11 +467,6 @@ static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned lon
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
#define ioremap_uc ioremap_nocache
-static inline void __iomem *ioremap_wt(unsigned long physaddr,
- unsigned long size)
-{
- return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
-}
static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
__builtin_memset((void __force *) addr, val, count);
diff --git a/arch/m68k/include/asm/io_no.h b/arch/m68k/include/asm/io_no.h
index 2690fa99dc56..b5890e593961 100644
--- a/arch/m68k/include/asm/io_no.h
+++ b/arch/m68k/include/asm/io_no.h
@@ -3,8 +3,6 @@
#ifdef __KERNEL__
-#define ARCH_HAS_IOREMAP_WT
-
#include <asm/virtconvert.h>
#include <asm-generic/iomap.h>
@@ -155,10 +153,6 @@ static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
-static inline void *ioremap_wt(unsigned long physaddr, unsigned long size)
-{
- return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
-}
#define iounmap(addr) do { } while(0)
/*
diff --git a/arch/m68k/include/asm/raw_io.h b/arch/m68k/include/asm/raw_io.h
index 932faa35655b..9f6e5a4e531b 100644
--- a/arch/m68k/include/asm/raw_io.h
+++ b/arch/m68k/include/asm/raw_io.h
@@ -25,7 +25,6 @@ extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
int cacheflag);
extern void __iounmap(void *addr, unsigned long size);
-
/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
* two accesses to memory, which may be undesirable for some devices.
*/
diff --git a/arch/metag/include/asm/io.h b/arch/metag/include/asm/io.h
index 5432949e627e..482ef3b5f5ba 100644
--- a/arch/metag/include/asm/io.h
+++ b/arch/metag/include/asm/io.h
@@ -157,9 +157,6 @@ extern void __iounmap(void __iomem *addr);
#define ioremap_wc(offset, size) \
__ioremap((offset), (size), _PAGE_WR_COMBINE)
-#define ioremap_wt(offset, size) \
- __ioremap((offset), (size), 0)
-
#define iounmap(addr) \
__iounmap(addr)
diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
index 5e0cbf4e4204..df7ffb3d9898 100644
--- a/arch/microblaze/include/asm/io.h
+++ b/arch/microblaze/include/asm/io.h
@@ -41,7 +41,6 @@ extern void iounmap(void __iomem *addr);
extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
#define ioremap_nocache(addr, size) ioremap((addr), (size))
#define ioremap_wc(addr, size) ioremap((addr), (size))
-#define ioremap_wt(addr, size) ioremap((addr), (size))
#endif /* CONFIG_MMU */
diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index 62189353d2f6..9d790fd00865 100644
--- a/arch/mn10300/include/asm/io.h
+++ b/arch/mn10300/include/asm/io.h
@@ -282,7 +282,6 @@ static inline void __iomem *ioremap_nocache(unsigned long offset, unsigned long
}
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
#define ioremap_uc ioremap_nocache
static inline void iounmap(void __iomem *addr)
diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
index c5a62da22cd2..6e24d7cceb0c 100644
--- a/arch/nios2/include/asm/io.h
+++ b/arch/nios2/include/asm/io.h
@@ -46,7 +46,6 @@ static inline void iounmap(void __iomem *addr)
}
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
/* Pages to physical address... */
#define page_to_phys(page) virt_to_phys(page_to_virt(page))
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 437e9af96688..6d4bb1b4a5b1 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -29,7 +29,6 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
#define ioremap_nocache(addr, size) ioremap(addr, size)
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
{
diff --git a/arch/sparc/include/asm/io_32.h b/arch/sparc/include/asm/io_32.h
index 57f26c398dc9..407ac14295f4 100644
--- a/arch/sparc/include/asm/io_32.h
+++ b/arch/sparc/include/asm/io_32.h
@@ -129,7 +129,6 @@ static inline void sbus_memcpy_toio(volatile void __iomem *dst,
void __iomem *ioremap(unsigned long offset, unsigned long size);
#define ioremap_nocache(X,Y) ioremap((X),(Y))
#define ioremap_wc(X,Y) ioremap((X),(Y))
-#define ioremap_wt(X,Y) ioremap((X),(Y))
void iounmap(volatile void __iomem *addr);
/* Create a virtual mapping cookie for an IO port range */
diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
index c32fa3f752c8..50d4840d9aeb 100644
--- a/arch/sparc/include/asm/io_64.h
+++ b/arch/sparc/include/asm/io_64.h
@@ -402,7 +402,6 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
#define ioremap_nocache(X,Y) ioremap((X),(Y))
#define ioremap_wc(X,Y) ioremap((X),(Y))
-#define ioremap_wt(X,Y) ioremap((X),(Y))
static inline void iounmap(volatile void __iomem *addr)
{
diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h
index 5879af3568c5..8c4551ae70de 100644
--- a/arch/tile/include/asm/io.h
+++ b/arch/tile/include/asm/io.h
@@ -54,7 +54,6 @@ extern void iounmap(volatile void __iomem *addr);
#define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
#define ioremap_wc(physaddr, size) ioremap(physaddr, size)
-#define ioremap_wt(physaddr, size) ioremap(physaddr, size)
#define ioremap_uc(physaddr, size) ioremap(physaddr, size)
#define mmiowb()
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index e643a96f7c23..746c1648dbd0 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -35,7 +35,6 @@
*/
#define ARCH_HAS_IOREMAP_WC
-#define ARCH_HAS_IOREMAP_WT
#include <linux/string.h>
#include <linux/compiler.h>
@@ -321,7 +320,6 @@ extern void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
extern int ioremap_change_attr(unsigned long vaddr, unsigned long size,
enum page_cache_mode pcm);
extern void __iomem *ioremap_wc(resource_size_t offset, unsigned long size);
-extern void __iomem *ioremap_wt(resource_size_t offset, unsigned long size);
extern bool is_early_ioremap_ptep(pte_t *ptep);
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 4bfe8b490b9a..f442c96ca8e4 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -293,23 +293,6 @@ void __iomem *ioremap_wc(resource_size_t phys_addr, unsigned long size)
}
EXPORT_SYMBOL(ioremap_wc);
-/**
- * ioremap_wt - map memory into CPU space write through
- * @phys_addr: bus address of the memory
- * @size: size of the resource to map
- *
- * This version of ioremap ensures that the memory is marked write through.
- * Write through stores data into memory while keeping the cache up-to-date.
- *
- * Must be freed with iounmap.
- */
-void __iomem *ioremap_wt(resource_size_t phys_addr, unsigned long size)
-{
- return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WT,
- __builtin_return_address(0));
-}
-EXPORT_SYMBOL(ioremap_wt);
-
void *arch_memremap(resource_size_t phys_addr, size_t size,
unsigned long flags)
{
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 9bfbecc0fc99..aaafd90c70db 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -49,7 +49,6 @@ static inline void __iomem *ioremap_nocache(unsigned long offset,
}
#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
{
diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 8b1d371b5404..c1235ea427e8 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -699,7 +699,7 @@ config FB_MAC
config FB_HP300
bool
- depends on (FB = y) && DIO
+ depends on (FB = y) && DIO && ARCH_HAS_MEMREMAP
select FB_CFB_IMAGEBLIT
default y
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index eed3bbe88c8a..5196b8ad16fc 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -813,14 +813,6 @@ static inline void __iomem *ioremap_wc(phys_addr_t offset, size_t size)
}
#endif
-#ifndef ioremap_wt
-#define ioremap_wt ioremap_wt
-static inline void __iomem *ioremap_wt(phys_addr_t offset, size_t size)
-{
- return ioremap_nocache(offset, size);
-}
-#endif
-
#ifndef iounmap
#define iounmap iounmap
diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h
index d8f8622fa044..1b41011643a5 100644
--- a/include/asm-generic/iomap.h
+++ b/include/asm-generic/iomap.h
@@ -66,10 +66,6 @@ extern void ioport_unmap(void __iomem *);
#define ioremap_wc ioremap_nocache
#endif
-#ifndef ARCH_HAS_IOREMAP_WT
-#define ioremap_wt ioremap_nocache
-#endif
-
#ifdef CONFIG_PCI
/* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
--
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