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Add ptr_to_compat() to s390 - needed by the new robust-futex code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> untested. CHECKME: am i right about the 0x7fffffffUL masking? Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>