mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-25 17:30:54 +07:00
d2f83e9078
ERROR: "memcpy_fromiovec" [drivers/vhost/vhost_scsi.ko] undefined!
That function is only present with CONFIG_NET. Turns out that
crypto/algif_skcipher.c also uses that outside net, but it actually
needs sockets anyway.
In addition, commit 6d4f0139d6 added
CONFIG_NET dependency to CONFIG_VMCI for memcpy_toiovec, so hoist
that function and revert that commit too.
socket.h already includes uio.h, so no callers need updating; trying
only broke things fo x86_64 randconfig (thanks Fengguang!).
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
#include <linux/uaccess.h>
|
|
#include <linux/export.h>
|
|
#include <linux/uio.h>
|
|
|
|
/*
|
|
* Copy iovec to kernel. Returns -EFAULT on error.
|
|
*
|
|
* Note: this modifies the original iovec.
|
|
*/
|
|
|
|
int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len)
|
|
{
|
|
while (len > 0) {
|
|
if (iov->iov_len) {
|
|
int copy = min_t(unsigned int, len, iov->iov_len);
|
|
if (copy_from_user(kdata, iov->iov_base, copy))
|
|
return -EFAULT;
|
|
len -= copy;
|
|
kdata += copy;
|
|
iov->iov_base += copy;
|
|
iov->iov_len -= copy;
|
|
}
|
|
iov++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(memcpy_fromiovec);
|
|
|
|
/*
|
|
* Copy kernel to iovec. Returns -EFAULT on error.
|
|
*
|
|
* Note: this modifies the original iovec.
|
|
*/
|
|
|
|
int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
|
|
{
|
|
while (len > 0) {
|
|
if (iov->iov_len) {
|
|
int copy = min_t(unsigned int, iov->iov_len, len);
|
|
if (copy_to_user(iov->iov_base, kdata, copy))
|
|
return -EFAULT;
|
|
kdata += copy;
|
|
len -= copy;
|
|
iov->iov_len -= copy;
|
|
iov->iov_base += copy;
|
|
}
|
|
iov++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(memcpy_toiovec);
|