mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
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>
53 lines
1 KiB
C
53 lines
1 KiB
C
#include <linux/uaccess.h>
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#include <linux/export.h>
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#include <linux/uio.h>
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/*
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* Copy iovec to kernel. Returns -EFAULT on error.
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*
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* Note: this modifies the original iovec.
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*/
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int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len)
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{
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while (len > 0) {
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if (iov->iov_len) {
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int copy = min_t(unsigned int, len, iov->iov_len);
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if (copy_from_user(kdata, iov->iov_base, copy))
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return -EFAULT;
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len -= copy;
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kdata += copy;
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iov->iov_base += copy;
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iov->iov_len -= copy;
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}
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iov++;
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}
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return 0;
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}
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EXPORT_SYMBOL(memcpy_fromiovec);
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/*
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* Copy kernel to iovec. Returns -EFAULT on error.
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*
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* Note: this modifies the original iovec.
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*/
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int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
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{
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while (len > 0) {
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if (iov->iov_len) {
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int copy = min_t(unsigned int, iov->iov_len, len);
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if (copy_to_user(iov->iov_base, kdata, copy))
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return -EFAULT;
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kdata += copy;
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len -= copy;
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iov->iov_len -= copy;
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iov->iov_base += copy;
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}
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iov++;
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}
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return 0;
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}
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EXPORT_SYMBOL(memcpy_toiovec);
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