Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] Fix sparse warnings.
  [S390] path grouping and path verifications fixes.
  [S390] xpram module parameter parsing.
  [S390] cpu_relax() is supposed to have barrier() semantics.
  [S390] fix futex_atomic_cmpxchg_inatomic
  [S390] subchannel register/unregister mutex.
  [S390] raw_local_save_flags/raw_local_irq_restore type check
  [S390] __builtin_trap() and gcc version.

8 files changed, 38 insertions, 21 deletions

diff --git a/include/asm-s390/bug.h b/include/asm-s390/bug.h
index 7ddaa05b98d8..876898363944 100644
--- a/include/asm-s390/bug.h
+++ b/include/asm-s390/bug.h
@@ -5,9 +5,18 @@
 
 #ifdef CONFIG_BUG
 
+static inline __attribute__((noreturn)) void __do_illegal_op(void)
+{
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
+	__builtin_trap();
+#else
+	asm volatile(".long 0");
+#endif
+}
+
 #define BUG() do { \
 	printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
-	__builtin_trap(); \
+	__do_illegal_op(); \
 } while (0)
 
 #define HAVE_ARCH_BUG
diff --git a/include/asm-s390/ccwdev.h b/include/asm-s390/ccwdev.h
index 12456cb2f882..58c70acffc73 100644
--- a/include/asm-s390/ccwdev.h
+++ b/include/asm-s390/ccwdev.h
@@ -63,7 +63,7 @@ ccw_device_id_match(const struct ccw_device_id *array,
 		return id;
 	}
 
-	return 0;
+	return NULL;
 }
 
 /* The struct ccw device is our replacement for the globally accessible
diff --git a/include/asm-s390/cio.h b/include/asm-s390/cio.h
index 2b1619306351..28fdd6e2b8ba 100644
--- a/include/asm-s390/cio.h
+++ b/include/asm-s390/cio.h
@@ -276,6 +276,8 @@ extern void wait_cons_dev(void);
 
 extern void clear_all_subchannels(void);
 
+extern void cio_reset_channel_paths(void);
+
 extern void css_schedule_reprobe(void);
 
 #endif
diff --git a/include/asm-s390/futex.h b/include/asm-s390/futex.h
index 1802775568b9..ffedf14f89f6 100644
--- a/include/asm-s390/futex.h
+++ b/include/asm-s390/futex.h
@@ -98,9 +98,10 @@ futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
 
 	if (! access_ok (VERIFY_WRITE, uaddr, sizeof(int)))
 		return -EFAULT;
-	asm volatile("   cs   %1,%4,0(%5)\n"
+	asm volatile("   sacf 256\n"
+		     "   cs   %1,%4,0(%5)\n"
 		     "0: lr   %0,%1\n"
-		     "1:\n"
+		     "1: sacf 0\n"
 #ifndef __s390x__
 		     ".section __ex_table,\"a\"\n"
 		     "   .align 4\n"
diff --git a/include/asm-s390/irqflags.h b/include/asm-s390/irqflags.h
index 65f4db627e7a..3b566a5b3cc7 100644
--- a/include/asm-s390/irqflags.h
+++ b/include/asm-s390/irqflags.h
@@ -25,16 +25,22 @@
 	__flags; \
 	})
 
-#define raw_local_save_flags(x) \
-	__asm__ __volatile__("stosm 0(%1),0" : "=m" (x) : "a" (&x), "m" (x) )
-
-#define raw_local_irq_restore(x) \
-	__asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory")
+#define raw_local_save_flags(x)							\
+do {										\
+	typecheck(unsigned long, x);						\
+	__asm__ __volatile__("stosm 0(%1),0" : "=m" (x) : "a" (&x), "m" (x) );	\
+} while (0)
+
+#define raw_local_irq_restore(x)						\
+do {										\
+	typecheck(unsigned long, x);						\
+	__asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory");	\
+} while (0)
 
 #define raw_irqs_disabled()		\
 ({					\
 	unsigned long flags;		\
-	local_save_flags(flags);	\
+	raw_local_save_flags(flags);	\
 	!((flags >> __FLAG_SHIFT) & 3);	\
 })
 
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h
index 3002fda89d33..a78e853e0dd5 100644
--- a/include/asm-s390/pgalloc.h
+++ b/include/asm-s390/pgalloc.h
@@ -142,7 +142,7 @@ pte_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
 	pte_t *pte = pte_alloc_one_kernel(mm, vmaddr);
 	if (pte)
 		return virt_to_page(pte);
-	return 0;
+	return NULL;
 }
 
 static inline void pte_free_kernel(pte_t *pte)
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index c5cbc4bd8414..5b71d3731723 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -199,15 +199,13 @@ unsigned long get_wchan(struct task_struct *p);
 /*
  * Give up the time slice of the virtual PU.
  */
-#ifndef __s390x__
-# define cpu_relax()	asm volatile ("diag 0,0,68" : : : "memory")
-#else /* __s390x__ */
-# define cpu_relax() \
-	do { \
-		if (MACHINE_HAS_DIAG44) \
-			asm volatile ("diag 0,0,68" : : : "memory"); \
-	} while (0)
-#endif /* __s390x__ */
+static inline void cpu_relax(void)
+{
+	if (MACHINE_HAS_DIAG44)
+		asm volatile ("diag 0,0,68" : : : "memory");
+	else
+		barrier();
+}
 
 /*
  * Set PSW to specified value.
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index da3fd4a7bb32..19e31979309a 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -40,15 +40,16 @@ extern unsigned long machine_flags;
 #define MACHINE_IS_VM		(machine_flags & 1)
 #define MACHINE_IS_P390		(machine_flags & 4)
 #define MACHINE_HAS_MVPG	(machine_flags & 16)
-#define MACHINE_HAS_DIAG44	(machine_flags & 32)
 #define MACHINE_HAS_IDTE	(machine_flags & 128)
 
 #ifndef __s390x__
 #define MACHINE_HAS_IEEE	(machine_flags & 2)
 #define MACHINE_HAS_CSP		(machine_flags & 8)
+#define MACHINE_HAS_DIAG44	(1)
 #else /* __s390x__ */
 #define MACHINE_HAS_IEEE	(1)
 #define MACHINE_HAS_CSP		(1)
+#define MACHINE_HAS_DIAG44	(machine_flags & 32)
 #endif /* __s390x__ */