diff options
Diffstat (limited to 'arch/s390/mm/maccess.c')
-rw-r--r-- | arch/s390/mm/maccess.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c index 9663ce3625bc..421efa46946b 100644 --- a/arch/s390/mm/maccess.c +++ b/arch/s390/mm/maccess.c @@ -4,8 +4,6 @@ * * Copyright IBM Corp. 2009, 2015 * - * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>, - * */ #include <linux/uaccess.h> @@ -14,6 +12,7 @@ #include <linux/errno.h> #include <linux/gfp.h> #include <linux/cpu.h> +#include <asm/asm-extable.h> #include <asm/ctl_reg.h> #include <asm/io.h> #include <asm/stacktrace.h> @@ -123,7 +122,7 @@ static unsigned long __no_sanitize_address _memcpy_real(unsigned long dest, /* * Copy memory in real mode (kernel to kernel) */ -int memcpy_real(void *dest, void *src, size_t count) +int memcpy_real(void *dest, unsigned long src, size_t count) { unsigned long _dest = (unsigned long)dest; unsigned long _src = (unsigned long)src; @@ -175,7 +174,7 @@ void memcpy_absolute(void *dest, void *src, size_t count) /* * Copy memory from kernel (real) to user (virtual) */ -int copy_to_user_real(void __user *dest, void *src, unsigned long count) +int copy_to_user_real(void __user *dest, unsigned long src, unsigned long count) { int offs = 0, size, rc; char *buf; @@ -201,15 +200,15 @@ out: /* * Check if physical address is within prefix or zero page */ -static int is_swapped(unsigned long addr) +static int is_swapped(phys_addr_t addr) { - unsigned long lc; + phys_addr_t lc; int cpu; if (addr < sizeof(struct lowcore)) return 1; for_each_online_cpu(cpu) { - lc = (unsigned long) lowcore_ptr[cpu]; + lc = virt_to_phys(lowcore_ptr[cpu]); if (addr > lc + sizeof(struct lowcore) - 1 || addr < lc) continue; return 1; @@ -225,7 +224,8 @@ static int is_swapped(unsigned long addr) */ void *xlate_dev_mem_ptr(phys_addr_t addr) { - void *bounce = (void *) addr; + void *ptr = phys_to_virt(addr); + void *bounce = ptr; unsigned long size; cpus_read_lock(); @@ -234,7 +234,7 @@ void *xlate_dev_mem_ptr(phys_addr_t addr) size = PAGE_SIZE - (addr & ~PAGE_MASK); bounce = (void *) __get_free_page(GFP_ATOMIC); if (bounce) - memcpy_absolute(bounce, (void *) addr, size); + memcpy_absolute(bounce, ptr, size); } preempt_enable(); cpus_read_unlock(); @@ -244,8 +244,8 @@ void *xlate_dev_mem_ptr(phys_addr_t addr) /* * Free converted buffer for /dev/mem access (if necessary) */ -void unxlate_dev_mem_ptr(phys_addr_t addr, void *buf) +void unxlate_dev_mem_ptr(phys_addr_t addr, void *ptr) { - if ((void *) addr != buf) - free_page((unsigned long) buf); + if (addr != virt_to_phys(ptr)) + free_page((unsigned long)ptr); } |