iov_iter: Mark copy_iovec_from_user() noclone

JIRA: https://issues.redhat.com/browse/RHEL-87739

commit 719a937
Author: Peter Zijlstra <peterz@infradead.org>
Date:   Fri Jun 16 14:43:55 2023 +0200

    iov_iter: Mark copy_iovec_from_user() noclone

    Extend commit 50f9a76 ("iov_iter: Mark
    copy_compat_iovec_from_user() noinline") to also cover
    copy_iovec_from_user(). Different compiler versions cause the same
    problem on different functions.

    lib/iov_iter.o: warning: objtool: .altinstr_replacement+0x1f: redundant UACCESS disable
    lib/iov_iter.o: warning: objtool: iovec_from_user+0x84: call to copy_iovec_from_user.part.0() with UACCESS enabled
    lib/iov_iter.o: warning: objtool: __import_iovec+0x143: call to copy_iovec_from_user.part.0() with UACCESS enabled

    Fixes: 50f9a76 ("iov_iter: Mark copy_compat_iovec_from_user() noinline")
    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Tested-by: Borislav Petkov (AMD) <bp@alien8.de>
    Link: https://lkml.kernel.org/r/20230616124354.GD4253@hirez.programming.kicks-ass.net

Signed-off-by: Ming Lei <ming.lei@redhat.com>

Author: Ming Lei

lib/iov_iter.c

@@ -1779,7 +1779,7 @@ static __noclone int copy_compat_iovec_from_user(struct iovec *iov,
 	return ret;
 }
 
-static int copy_iovec_from_user(struct iovec *iov,
+static __noclone int copy_iovec_from_user(struct iovec *iov,
 		const struct iovec __user *uvec, unsigned long nr_segs)
 {
 	unsigned long seg;