mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
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Gennady Sharapov
bb57842625
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from uaccess_user.c file under os-Linux dir Signed-off-by: Gennady Sharapov <[email protected]> Signed-off-by: Jeff Dike <[email protected]> Cc: Paolo Giarrusso <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
31 lines
746 B
C
31 lines
746 B
C
/*
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* Copyright (C) 2001 Chris Emerson ([email protected])
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* Copyright (C) 2001, 2002 Jeff Dike ([email protected])
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* Licensed under the GPL
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*/
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/* These are here rather than tt/uaccess.c because skas mode needs them in
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* order to do SIGBUS recovery when a tmpfs mount runs out of room.
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*/
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#include <linux/string.h>
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#include "os.h"
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void __do_copy(void *to, const void *from, int n)
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{
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memcpy(to, from, n);
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}
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int __do_copy_to_user(void *to, const void *from, int n,
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void **fault_addr, void **fault_catcher)
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{
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unsigned long fault;
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int faulted;
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fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
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__do_copy, &faulted);
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if(!faulted) return(0);
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else return(n - (fault - (unsigned long) to));
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}
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