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Message-ID: <20150725024015.8664.42950.stgit@dwillia2-desk3.amr.corp.intel.com>
Date: Fri, 24 Jul 2015 22:40:15 -0400
From: Dan Williams <dan.j.williams@...el.com>
To: tglx@...utronix.de, mingo@...nel.org, hpa@...or.com
Cc: linux-arch@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
toshi.kani@...com, Arnd Bergmann <arnd@...db.de>,
linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
rmk+kernel@....linux.org.uk, hch@....de,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 24/25] arch: remove ioremap_wt, replace with arch_memremap
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.
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Russell King <rmk+kernel@....linux.org.uk>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
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/Kconfig | 1 +
arch/frv/include/asm/io.h | 17 ++++++-----------
arch/frv/mm/kmap.c | 6 ++++++
arch/m32r/include/asm/io.h | 1 -
arch/m68k/Kconfig | 1 +
arch/m68k/include/asm/io_mm.h | 14 ++------------
arch/m68k/include/asm/io_no.h | 12 ++++++------
arch/m68k/include/asm/raw_io.h | 4 ++++
arch/m68k/mm/kmap.c | 17 ++++++++++++++++-
arch/m68k/mm/sun3kmap.c | 6 ++++++
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 ----
28 files changed, 49 insertions(+), 79 deletions(-)
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 989eeaa8dd84..89114571cf11 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(CACHE) 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
@@ -397,7 +396,6 @@ void __iomem *arch_memremap(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 305d1c9b3352..a03157daeb1c 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -170,7 +170,6 @@ extern void *arch_memremap(phys_addr_t phys_addr, size_t size, unsigned long fla
#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
static inline void memunmap(void *addr)
diff --git a/arch/avr32/include/asm/io.h b/arch/avr32/include/asm/io.h
index e998ff5d8e1a..4f5ec2bb7172 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 cached(addr) P1SEGADDR(addr)
#define uncached(addr) P2SEGADDR(addr)
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 34aa19352dc1..b1b4000807fb 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -7,6 +7,7 @@ config FRV
select HAVE_UID16
select VIRT_TO_BUS
select GENERIC_IRQ_SHOW
+ select ARCH_HAS_MEMREMAP
select HAVE_DEBUG_BUGVERBOSE
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_CPU_DEVICES
diff --git a/arch/frv/include/asm/io.h b/arch/frv/include/asm/io.h
index a31b63ec4930..3e908abc41cd 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>
@@ -267,20 +265,17 @@ 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);
-}
-
-static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
-{
- return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
-}
+void *arch_memremap(resource_size_t offset, size_t size, unsigned long flags);
#define ioremap_wc ioremap_nocache
extern void iounmap(void volatile __iomem *addr);
+static inline void arch_memunmap(void *addr)
+{
+ iounmap((volatile void __force *) addr);
+}
+
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
return (void __iomem *) port;
diff --git a/arch/frv/mm/kmap.c b/arch/frv/mm/kmap.c
index e9217e605aa8..ba7d73383c10 100644
--- a/arch/frv/mm/kmap.c
+++ b/arch/frv/mm/kmap.c
@@ -34,6 +34,12 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
return (void __iomem *)physaddr;
}
+void *arch_memremap(resource_size_t offset, size_t size, unsigned long flags)
+{
+ return (void *) offset;
+}
+EXPORT_SYMBOL(arch_memremap);
+
/*
* Unmap a ioremap()ed region again
*/
diff --git a/arch/m32r/include/asm/io.h b/arch/m32r/include/asm/io.h
index 0c3f25ee3381..9cc00dbd59ce 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
/*
* IO bus memory addresses are also 1:1 with the physical address
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 2dd8f63bfbbb..693d06dc0a40 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -9,6 +9,7 @@ config M68K
select GENERIC_ATOMIC64
select HAVE_UID16
select VIRT_TO_BUS
+ select ARCH_HAS_MEMREMAP
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
select GENERIC_CPU_DEVICES
select GENERIC_IOMAP
diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h
index f55cad529400..c91872e62dc3 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>
@@ -468,16 +466,8 @@ 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);
-}
-static inline void __iomem *ioremap_fullcache(unsigned long physaddr,
- unsigned long size)
-{
- return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
-}
+
+void *arch_memremap(resource_size_t offset, size_t size, unsigned long flags);
static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
{
diff --git a/arch/m68k/include/asm/io_no.h b/arch/m68k/include/asm/io_no.h
index ad7bd40e6742..008633ba49ce 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>
@@ -155,13 +153,15 @@ 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)
+
+static inline void *arch_memremap(resource_size_t offset, size_t size,
+ unsigned long flags)
{
- return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
+ return (void *) offset;
}
-static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
+
+static inline void arch_memunmap(void *addr)
{
- return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}
#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..f6f1448407d9 100644
--- a/arch/m68k/include/asm/raw_io.h
+++ b/arch/m68k/include/asm/raw_io.h
@@ -25,6 +25,10 @@ extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
int cacheflag);
extern void __iounmap(void *addr, unsigned long size);
+static inline void arch_memunmap(void *addr)
+{
+ iounmap((void __iomem *) addr);
+}
/* ++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/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 6e4955bc542b..94f334af9a63 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -14,12 +14,12 @@
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <linux/io.h>
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
-#include <asm/io.h>
#undef DEBUG
@@ -223,6 +223,21 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
}
EXPORT_SYMBOL(__ioremap);
+void *arch_memremap(resource_size_t offset, size_t size, unsigned long flags)
+{
+ int mode;
+
+ if (flags & MEMREMAP_CACHE)
+ mode = IOMAP_FULL_CACHING;
+ else if (flags & MEMREMAP_WT)
+ mode = IOMAP_WRITETHROUGH;
+ else
+ return NULL;
+
+ return (void __force *) __ioremap(offset, size, mode);
+}
+EXPORT_SYMBOL(arch_memremap);
+
/*
* Unmap an ioremap()ed region again
*/
diff --git a/arch/m68k/mm/sun3kmap.c b/arch/m68k/mm/sun3kmap.c
index 3dc41158c05e..46af60b7f0c7 100644
--- a/arch/m68k/mm/sun3kmap.c
+++ b/arch/m68k/mm/sun3kmap.c
@@ -116,6 +116,12 @@ void __iomem *__ioremap(unsigned long phys, unsigned long size, int cache)
}
EXPORT_SYMBOL(__ioremap);
+void *arch_memremap(resource_size_t offset, size_t size, unsigned long flags)
+{
+ return (void __force *) sun3_ioremap(offset, size, SUN3_PAGE_TYPE_IO);
+}
+EXPORT_SYMBOL(arch_memremap);
+
void iounmap(void __iomem *addr)
{
vfree((void *)(PAGE_MASK & (unsigned long)addr));
diff --git a/arch/metag/include/asm/io.h b/arch/metag/include/asm/io.h
index 9890f21eadbe..d5779b0ec573 100644
--- a/arch/metag/include/asm/io.h
+++ b/arch/metag/include/asm/io.h
@@ -160,9 +160,6 @@ 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 39b6315db82e..4efa4fd023bd 100644
--- a/arch/microblaze/include/asm/io.h
+++ b/arch/microblaze/include/asm/io.h
@@ -42,7 +42,6 @@ extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
#define ioremap_nocache(addr, size) ioremap((addr), (size))
#define ioremap_fullcache(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 07c5b4a3903b..cc4a2ba9e228 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
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 cb5fdf3a78fc..30fd5c84680e 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 dc61de15c1f9..eece4fc730e4 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_fullcache(physaddr, size) ioremap(physaddr, size)
#define mmiowb()
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index d13ac9cbdc30..bba4e8968bc7 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>
@@ -328,7 +327,6 @@ 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 8d5c88bcd09b..987a58e84e2f 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 da6c8290e432..b9fdd90e89da 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -59,7 +59,6 @@ static inline void *arch_memremap(resource_size_t offset, size_t 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/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index 2d98de535e0f..b76ec47c6810 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 f56094cfdeff..f5abd5540249 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -785,14 +785,6 @@ 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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