[PATCH v2 10/25] x86: switch from ioremap_cache to memremap

Dan Williams
2015-07-25T02:44:40Z

In preparation for deprecating ioremap_cache() convert its usage in
arch/x86/ to memremap.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
arch/x86/include/asm/efi.h | 3 ++-
arch/x86/kernel/crash_dump_64.c | 6 +++---
arch/x86/kernel/kdebugfs.c | 8 ++++----
arch/x86/kernel/ksysfs.c | 28 ++++++++++++++--------------
arch/x86/mm/ioremap.c | 10 ++++------
5 files changed, 27 insertions(+), 28 deletions(-)

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 155162ea0e00..755272a8c45f 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -54,7 +54,8 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
kernel_fpu_end(); \
})

-#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
+#define efi_ioremap(addr, size, type, attr) \
+ memremap(addr, size, MEMREMAP_CACHE)

#else /* !CONFIG_X86_32 */

diff --git a/arch/x86/kernel/crash_dump_64.c b/arch/x86/kernel/crash_dump_64.c
index afa64adb75ee..b87ca059e5fc 100644
--- a/arch/x86/kernel/crash_dump_64.c
+++ b/arch/x86/kernel/crash_dump_64.c
@@ -31,19 +31,19 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
if (!csize)
return 0;

- vaddr = ioremap_cache(pfn << PAGE_SHIFT, PAGE_SIZE);
+ vaddr = memremap(pfn << PAGE_SHIFT, PAGE_SIZE, MEMREMAP_CACHE);
if (!vaddr)
return -ENOMEM;

if (userbuf) {
if (copy_to_user(buf, vaddr + offset, csize)) {
- iounmap(vaddr);
+ memunmap(vaddr);
return -EFAULT;
}
} else
memcpy(buf, vaddr + offset, csize);

set_iounmap_nonlazy();
- iounmap(vaddr);
+ memunmap(vaddr);
return csize;
}
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index dc1404bf8e4b..a2248482c14b 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -49,7 +49,7 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
pa = node->paddr + sizeof(struct setup_data) + pos;
pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
if (PageHighMem(pg)) {
- p = ioremap_cache(pa, count);
+ p = memremap(pa, count, MEMREMAP_CACHE);
if (!p)
return -ENXIO;
} else
@@ -58,7 +58,7 @@ static ssize_t setup_data_read(struct file *file, char __user *user_buf,
remain = copy_to_user(user_buf, p, count);

if (PageHighMem(pg))
- iounmap(p);
+ memunmap(p);

if (remain)
return -EFAULT;
@@ -128,7 +128,7 @@ static int __init create_setup_data_nodes(struct dentry *parent)

pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
if (PageHighMem(pg)) {
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_CACHE);
if (!data) {
kfree(node);
error = -ENXIO;
@@ -144,7 +144,7 @@ static int __init create_setup_data_nodes(struct dentry *parent)
pa_data = data->next;

if (PageHighMem(pg))
- iounmap(data);
+ memunmap(data);
if (error)
goto err_dir;
no++;
diff --git a/arch/x86/kernel/ksysfs.c b/arch/x86/kernel/ksysfs.c
index c2bedaea11f7..d2670bb75a08 100644
--- a/arch/x86/kernel/ksysfs.c
+++ b/arch/x86/kernel/ksysfs.c
@@ -16,8 +16,8 @@
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/mm.h>
+#include <linux/io.h>

-#include <asm/io.h>
#include <asm/setup.h>

static ssize_t version_show(struct kobject *kobj,
@@ -79,12 +79,12 @@ static int get_setup_data_paddr(int nr, u64 *paddr)
*paddr = pa_data;
return 0;
}
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_CACHE);
if (!data)
return -ENOMEM;

pa_data = data->next;
- iounmap(data);
+ memunmap(data);
i++;
}
return -EINVAL;
@@ -97,17 +97,17 @@ static int __init get_setup_data_size(int nr, size_t *size)
u64 pa_data = boot_params.hdr.setup_data;

while (pa_data) {
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_CACHE);
if (!data)
return -ENOMEM;
if (nr == i) {
*size = data->len;
- iounmap(data);
+ memunmap(data);
return 0;
}

pa_data = data->next;
- iounmap(data);
+ memunmap(data);
i++;
}
return -EINVAL;
@@ -127,12 +127,12 @@ static ssize_t type_show(struct kobject *kobj,
ret = get_setup_data_paddr(nr, &paddr);
if (ret)
return ret;
- data = ioremap_cache(paddr, sizeof(*data));
+ data = memremap(paddr, sizeof(*data), MEMREMAP_CACHE);
if (!data)
return -ENOMEM;

ret = sprintf(buf, "0x%x\n", data->type);
- iounmap(data);
+ memunmap(data);
return ret;
}

@@ -154,7 +154,7 @@ static ssize_t setup_data_data_read(struct file *fp,
ret = get_setup_data_paddr(nr, &paddr);
if (ret)
return ret;
- data = ioremap_cache(paddr, sizeof(*data));
+ data = memremap(paddr, sizeof(*data), MEMREMAP_CACHE);
if (!data)
return -ENOMEM;

@@ -170,15 +170,15 @@ static ssize_t setup_data_data_read(struct file *fp,
goto out;

ret = count;
- p = ioremap_cache(paddr + sizeof(*data), data->len);
+ p = memremap(paddr + sizeof(*data), data->len, MEMREMAP_CACHE);
if (!p) {
ret = -ENOMEM;
goto out;
}
memcpy(buf, p + off, count);
- iounmap(p);
+ memunmap(p);
out:
- iounmap(data);
+ memunmap(data);
return ret;
}

@@ -250,13 +250,13 @@ static int __init get_setup_data_total_num(u64 pa_data, int *nr)
*nr = 0;
while (pa_data) {
*nr += 1;
- data = ioremap_cache(pa_data, sizeof(*data));
+ data = memremap(pa_data, sizeof(*data), MEMREMAP_CACHE);
if (!data) {
ret = -ENOMEM;
goto out;
}
pa_data = data->next;
- iounmap(data);
+ memunmap(data);
}

out:
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 12b1eaeab6b9..6f759c7c2ab7 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -403,12 +403,10 @@ void *xlate_dev_mem_ptr(phys_addr_t phys)
if (page_is_ram(start >> PAGE_SHIFT))
return __va(phys);

- vaddr = ioremap_cache(start, PAGE_SIZE);
- /* Only add the offset on success and return NULL if the ioremap() failed: */
+ vaddr = memremap(start, PAGE_SIZE, MEMREMAP_CACHE);
if (vaddr)
- vaddr += offset;
-
- return vaddr;
+ return vaddr + offset;
+ return NULL;
}

void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
@@ -416,7 +414,7 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
if (page_is_ram(phys >> PAGE_SHIFT))
return;

- iounmap((void __iomem *)((unsigned long)addr & PAGE_MASK));
+ memunmap((void *)((unsigned long)addr & PAGE_MASK));
}

static pte_t bm_pte[PAGE_SIZE/sizeof(pte_t)] __page_aligned_bss;