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path: root/drivers/s390/char/zcore.c
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Diffstat (limited to 'drivers/s390/char/zcore.c')
-rw-r--r--drivers/s390/char/zcore.c38
1 files changed, 4 insertions, 34 deletions
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 3438658b66b7..7217966f7d31 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -13,6 +13,7 @@
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
+#include <linux/slab.h>
#include <linux/miscdevice.h>
#include <linux/debugfs.h>
#include <asm/asm-offsets.h>
@@ -141,33 +142,6 @@ static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
return memcpy_hsa(dest, src, count, TO_KERNEL);
}
-static int memcpy_real(void *dest, unsigned long src, size_t count)
-{
- unsigned long flags;
- int rc = -EFAULT;
- register unsigned long _dest asm("2") = (unsigned long) dest;
- register unsigned long _len1 asm("3") = (unsigned long) count;
- register unsigned long _src asm("4") = src;
- register unsigned long _len2 asm("5") = (unsigned long) count;
-
- if (count == 0)
- return 0;
- flags = __raw_local_irq_stnsm(0xf8UL); /* switch to real mode */
- asm volatile (
- "0: mvcle %1,%2,0x0\n"
- "1: jo 0b\n"
- " lhi %0,0x0\n"
- "2:\n"
- EX_TABLE(1b,2b)
- : "+d" (rc), "+d" (_dest), "+d" (_src), "+d" (_len1),
- "+d" (_len2), "=m" (*((long*)dest))
- : "m" (*((long*)src))
- : "cc", "memory");
- __raw_local_irq_ssm(flags);
-
- return rc;
-}
-
static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
{
static char buf[4096];
@@ -175,7 +149,7 @@ static int memcpy_real_user(void __user *dest, unsigned long src, size_t count)
while (offs < count) {
size = min(sizeof(buf), count - offs);
- if (memcpy_real(buf, src + offs, size))
+ if (memcpy_real(buf, (void *) src + offs, size))
return -EFAULT;
if (copy_to_user(dest + offs, buf, size))
return -EFAULT;
@@ -663,12 +637,8 @@ static int __init zcore_reipl_init(void)
if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE)
rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
else
- rc = memcpy_real(ipl_block, ipib_info.ipib, PAGE_SIZE);
- if (rc) {
- free_page((unsigned long) ipl_block);
- return rc;
- }
- if (csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
+ rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
+ if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
ipib_info.checksum) {
TRACE("Checksum does not match\n");
free_page((unsigned long) ipl_block);