From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 27 Mar 2006 09:16:09 +0000 (-0800)
Subject: [PATCH] s390: add ptr_to_compat()
X-Git-Tag: firefly_0821_release~36809
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f267fa9f5b377b5cecdb2baf332fec08bb71246d;p=firefly-linux-kernel-4.4.55.git

[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>
---

diff --git a/include/asm-s390/compat.h b/include/asm-s390/compat.h
index a007715f4aea..356a0b183539 100644
--- a/include/asm-s390/compat.h
+++ b/include/asm-s390/compat.h
@@ -128,6 +128,11 @@ static inline void __user *compat_ptr(compat_uptr_t uptr)
 	return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
 }
 
+static inline compat_uptr_t ptr_to_compat(void __user *uptr)
+{
+	return (u32)(unsigned long)uptr;
+}
+
 static inline void __user *compat_alloc_user_space(long len)
 {
 	unsigned long stack;