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author | 2011-10-30 15:16:39 +0100 | |
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committer | 2011-10-30 15:16:42 +0100 | |
commit | 7f0bf656c66e4292e965c95fd9de55c72b6578bb (patch) | |
tree | 5940a3c7ce75d64deb03a0a4f2199f64c497c1bf /drivers/s390/char/zcore.c | |
parent | [S390] Force PSW restart on online CPU (diff) | |
download | linux-7f0bf656c66e4292e965c95fd9de55c72b6578bb.tar.gz linux-7f0bf656c66e4292e965c95fd9de55c72b6578bb.tar.bz2 linux-7f0bf656c66e4292e965c95fd9de55c72b6578bb.zip |
[S390] Add real memory access functions
Add access function for real memory needed by s390 kdump backend.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/zcore.c')
-rw-r--r-- | drivers/s390/char/zcore.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index 3b94044027c2..f4f1da213e28 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -142,22 +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_user(void __user *dest, unsigned long src, size_t count) -{ - static char buf[4096]; - int offs = 0, size; - - while (offs < count) { - size = min(sizeof(buf), count - offs); - if (memcpy_real(buf, (void *) src + offs, size)) - return -EFAULT; - if (copy_to_user(dest + offs, buf, size)) - return -EFAULT; - offs += size; - } - return 0; -} - static int __init init_cpu_info(enum arch_id arch) { struct save_area *sa; @@ -346,8 +330,8 @@ static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, /* Copy from real mem */ size = count - mem_offs - hdr_count; - rc = memcpy_real_user(buf + hdr_count + mem_offs, mem_start + mem_offs, - size); + rc = copy_to_user_real(buf + hdr_count + mem_offs, + (void *) mem_start + mem_offs, size); if (rc) goto fail; |