[PATCH] s390: add ptr_to_compat()
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>
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@ -128,6 +128,11 @@ static inline void __user *compat_ptr(compat_uptr_t uptr)
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return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
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}
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static inline compat_uptr_t ptr_to_compat(void __user *uptr)
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{
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return (u32)(unsigned long)uptr;
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}
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static inline void __user *compat_alloc_user_space(long len)
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{
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unsigned long stack;
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