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

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] cmpxchg: implement cmpxchg64() [S390] xchg/cmpxchg: move to own header file [S390] ccwgroup_driver: remove duplicate members [S390] ccw_bus_type: make it static [S390] ccw_driver: remove duplicate members [S390] qdio: prevent handling of buffers if count is zero [S390] setup: register bss section as resource [S390] setup: simplify setup_resources() [S390] wire up sys_syncfs [S390] wire up sys_clock_adjtime [S390] wire up sys_open_by_handle_at [S390] wire up sys_name_to_handle_at [S390] oprofile: disable hw sampling for CONFIG_32BIT [S390] early: limit savesys cmd string handling [S390] early: Fix possible overlapping data buffer
CamonZ · Mar 26, 2011 · 7c8d891 · 7c8d891
2 parents 62d0086 + 54eaae3
commit 7c8d891
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Showing 27 changed files with 403 additions and 306 deletions.
diff --git a/arch/s390/include/asm/ccwdev.h b/arch/s390/include/asm/ccwdev.h
@@ -112,7 +112,6 @@ enum uc_todo {
 
 /**
  * struct ccw driver - device driver for channel attached devices
- * @owner: owning module
  * @ids: ids supported by this driver
  * @probe: function called on probe
  * @remove: function called on remove
@@ -128,10 +127,8 @@ enum uc_todo {
  * @restore: callback for restoring after hibernation
  * @uc_handler: callback for unit check handler
  * @driver: embedded device driver structure
- * @name: device driver name
  */
 struct ccw_driver {
-	struct module *owner;
 	struct ccw_device_id *ids;
 	int (*probe) (struct ccw_device *);
 	void (*remove) (struct ccw_device *);
@@ -147,7 +144,6 @@ struct ccw_driver {
 	int (*restore)(struct ccw_device *);
 	enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *);
 	struct device_driver driver;
-	char *name;
 };
 
 extern struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv,

diff --git a/arch/s390/include/asm/ccwgroup.h b/arch/s390/include/asm/ccwgroup.h
@@ -29,8 +29,6 @@ struct ccwgroup_device {
 
 /**
  * struct ccwgroup_driver - driver for ccw group devices
- * @owner: driver owner
- * @name: driver name
  * @max_slaves: maximum number of slave devices
  * @driver_id: unique id
  * @probe: function called on probe
@@ -46,8 +44,6 @@ struct ccwgroup_device {
  * @driver: embedded driver structure
  */
 struct ccwgroup_driver {
-	struct module *owner;
-	char *name;
 	int max_slaves;
 	unsigned long driver_id;
 

diff --git a/arch/s390/include/asm/cmpxchg.h b/arch/s390/include/asm/cmpxchg.h
@@ -0,0 +1,225 @@
+/*
+ * Copyright IBM Corp. 1999, 2011
+ *
+ * Author(s): Martin Schwidefsky <[email protected]>,
+ */
+
+#ifndef __ASM_CMPXCHG_H
+#define __ASM_CMPXCHG_H
+
+#include <linux/types.h>
+
+extern void __xchg_called_with_bad_pointer(void);
+
+static inline unsigned long __xchg(unsigned long x, void *ptr, int size)
+{
+	unsigned long addr, old;
+	int shift;
+
+	switch (size) {
+	case 1:
+		addr = (unsigned long) ptr;
+		shift = (3 ^ (addr & 3)) << 3;
+		addr ^= addr & 3;
+		asm volatile(
+			"	l	%0,%4\n"
+			"0:	lr	0,%0\n"
+			"	nr	0,%3\n"
+			"	or	0,%2\n"
+			"	cs	%0,0,%4\n"
+			"	jl	0b\n"
+			: "=&d" (old), "=Q" (*(int *) addr)
+			: "d" (x << shift), "d" (~(255 << shift)),
+			  "Q" (*(int *) addr) : "memory", "cc", "0");
+		return old >> shift;
+	case 2:
+		addr = (unsigned long) ptr;
+		shift = (2 ^ (addr & 2)) << 3;
+		addr ^= addr & 2;
+		asm volatile(
+			"	l	%0,%4\n"
+			"0:	lr	0,%0\n"
+			"	nr	0,%3\n"
+			"	or	0,%2\n"
+			"	cs	%0,0,%4\n"
+			"	jl	0b\n"
+			: "=&d" (old), "=Q" (*(int *) addr)
+			: "d" (x << shift), "d" (~(65535 << shift)),
+			  "Q" (*(int *) addr) : "memory", "cc", "0");
+		return old >> shift;
+	case 4:
+		asm volatile(
+			"	l	%0,%3\n"
+			"0:	cs	%0,%2,%3\n"
+			"	jl	0b\n"
+			: "=&d" (old), "=Q" (*(int *) ptr)
+			: "d" (x), "Q" (*(int *) ptr)
+			: "memory", "cc");
+		return old;
+#ifdef CONFIG_64BIT
+	case 8:
+		asm volatile(
+			"	lg	%0,%3\n"
+			"0:	csg	%0,%2,%3\n"
+			"	jl	0b\n"
+			: "=&d" (old), "=m" (*(long *) ptr)
+			: "d" (x), "Q" (*(long *) ptr)
+			: "memory", "cc");
+		return old;
+#endif /* CONFIG_64BIT */
+	}
+	__xchg_called_with_bad_pointer();
+	return x;
+}
+
+#define xchg(ptr, x)							  \
+({									  \
+	__typeof__(*(ptr)) __ret;					  \
+	__ret = (__typeof__(*(ptr)))					  \
+		__xchg((unsigned long)(x), (void *)(ptr), sizeof(*(ptr)));\
+	__ret;								  \
+})
+
+/*
+ * Atomic compare and exchange.	 Compare OLD with MEM, if identical,
+ * store NEW in MEM.  Return the initial value in MEM.	Success is
+ * indicated by comparing RETURN with OLD.
+ */
+
+#define __HAVE_ARCH_CMPXCHG
+
+extern void __cmpxchg_called_with_bad_pointer(void);
+
+static inline unsigned long __cmpxchg(void *ptr, unsigned long old,
+				      unsigned long new, int size)
+{
+	unsigned long addr, prev, tmp;
+	int shift;
+
+	switch (size) {
+	case 1:
+		addr = (unsigned long) ptr;
+		shift = (3 ^ (addr & 3)) << 3;
+		addr ^= addr & 3;
+		asm volatile(
+			"	l	%0,%2\n"
+			"0:	nr	%0,%5\n"
+			"	lr	%1,%0\n"
+			"	or	%0,%3\n"
+			"	or	%1,%4\n"
+			"	cs	%0,%1,%2\n"
+			"	jnl	1f\n"
+			"	xr	%1,%0\n"
+			"	nr	%1,%5\n"
+			"	jnz	0b\n"
+			"1:"
+			: "=&d" (prev), "=&d" (tmp), "=Q" (*(int *) ptr)
+			: "d" (old << shift), "d" (new << shift),
+			  "d" (~(255 << shift)), "Q" (*(int *) ptr)
+			: "memory", "cc");
+		return prev >> shift;
+	case 2:
+		addr = (unsigned long) ptr;
+		shift = (2 ^ (addr & 2)) << 3;
+		addr ^= addr & 2;
+		asm volatile(
+			"	l	%0,%2\n"
+			"0:	nr	%0,%5\n"
+			"	lr	%1,%0\n"
+			"	or	%0,%3\n"
+			"	or	%1,%4\n"
+			"	cs	%0,%1,%2\n"
+			"	jnl	1f\n"
+			"	xr	%1,%0\n"
+			"	nr	%1,%5\n"
+			"	jnz	0b\n"
+			"1:"
+			: "=&d" (prev), "=&d" (tmp), "=Q" (*(int *) ptr)
+			: "d" (old << shift), "d" (new << shift),
+			  "d" (~(65535 << shift)), "Q" (*(int *) ptr)
+			: "memory", "cc");
+		return prev >> shift;
+	case 4:
+		asm volatile(
+			"	cs	%0,%3,%1\n"
+			: "=&d" (prev), "=Q" (*(int *) ptr)
+			: "0" (old), "d" (new), "Q" (*(int *) ptr)
+			: "memory", "cc");
+		return prev;
+#ifdef CONFIG_64BIT
+	case 8:
+		asm volatile(
+			"	csg	%0,%3,%1\n"
+			: "=&d" (prev), "=Q" (*(long *) ptr)
+			: "0" (old), "d" (new), "Q" (*(long *) ptr)
+			: "memory", "cc");
+		return prev;
+#endif /* CONFIG_64BIT */
+	}
+	__cmpxchg_called_with_bad_pointer();
+	return old;
+}
+
+#define cmpxchg(ptr, o, n)						\
+	((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o),	\
+				       (unsigned long)(n), sizeof(*(ptr))))
+
+#ifdef CONFIG_64BIT
+#define cmpxchg64(ptr, o, n)						\
+({									\
+	BUILD_BUG_ON(sizeof(*(ptr)) != 8);				\
+	cmpxchg((ptr), (o), (n));					\
+})
+#else /* CONFIG_64BIT */
+static inline unsigned long long __cmpxchg64(void *ptr,
+					     unsigned long long old,
+					     unsigned long long new)
+{
+	register_pair rp_old = {.pair = old};
+	register_pair rp_new = {.pair = new};
+
+	asm volatile(
+		"	cds	%0,%2,%1"
+		: "+&d" (rp_old), "=Q" (ptr)
+		: "d" (rp_new), "Q" (ptr)
+		: "cc");
+	return rp_old.pair;
+}
+#define cmpxchg64(ptr, o, n)						\
+	((__typeof__(*(ptr)))__cmpxchg64((ptr),				\
+					 (unsigned long long)(o),	\
+					 (unsigned long long)(n)))
+#endif /* CONFIG_64BIT */
+
+#include <asm-generic/cmpxchg-local.h>
+
+static inline unsigned long __cmpxchg_local(void *ptr,
+					    unsigned long old,
+					    unsigned long new, int size)
+{
+	switch (size) {
+	case 1:
+	case 2:
+	case 4:
+#ifdef CONFIG_64BIT
+	case 8:
+#endif
+		return __cmpxchg(ptr, old, new, size);
+	default:
+		return __cmpxchg_local_generic(ptr, old, new, size);
+	}
+
+	return old;
+}
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)					\
+	((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o),	\
+			(unsigned long)(n), sizeof(*(ptr))))
+
+#define cmpxchg64_local(ptr, o, n)	cmpxchg64((ptr), (o), (n))
+
+#endif /* __ASM_CMPXCHG_H */