sysdev: Pass the attribute to the low level sysdev show/store function

This allow to dynamically generate attributes and share show/store
functions between attributes. Right now most attributes are generated
by special macros and lots of duplicated code. With the attribute
passed it's instead possible to attach some data to the attribute
and then use that in shared low level functions to do different things.

I need this for the dynamically generated bank attributes in the x86
machine check code, but it'll allow some further cleanups.

I converted all users in tree to the new show/store prototype. It's a single
huge patch to avoid unbisectable sections.

Runtime tested: x86-32, x86-64
Compiled only: ia64, powerpc
Not compile tested/only grep converted: sh, arm, avr32

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 25 insertions, 13 deletions

diff --git a/arch/avr32/kernel/cpu.c b/arch/avr32/kernel/cpu.c
index b8409ca..e84faff 100644
--- a/arch/avr32/kernel/cpu.c
+++ b/arch/avr32/kernel/cpu.c
@@ -26,14 +26,16 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices);
  * XXX: If/when a SMP-capable implementation of AVR32 will ever be
  * made, we must make sure that the code executes on the correct CPU.
  */
-static ssize_t show_pc0event(struct sys_device *dev, char *buf)
+static ssize_t show_pc0event(struct sys_device *dev,
+			struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pccr;
 
 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
 }
-static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
+static ssize_t store_pc0event(struct sys_device *dev,
+			struct sysdev_attribute *attr, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
@@ -46,15 +48,17 @@ static ssize_t store_pc0event(struct sys_device *dev, const char *buf,
 	sysreg_write(PCCR, val);
 	return count;
 }
-static ssize_t show_pc0count(struct sys_device *dev, char *buf)
+static ssize_t show_pc0count(struct sys_device *dev,
+			struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pcnt0;
 
 	pcnt0 = sysreg_read(PCNT0);
 	return sprintf(buf, "%lu\n", pcnt0);
 }
-static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
-			      size_t count)
+static ssize_t store_pc0count(struct sys_device *dev,
+				struct sysdev_attribute *attr,
+				const char *buf, size_t count)
 {
 	unsigned long val;
 	char *endp;
@@ -67,14 +71,16 @@ static ssize_t store_pc0count(struct sys_device *dev, const char *buf,
 	return count;
 }
 
-static ssize_t show_pc1event(struct sys_device *dev, char *buf)
+static ssize_t show_pc1event(struct sys_device *dev,
+				struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pccr;
 
 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
 }
-static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
+static ssize_t store_pc1event(struct sys_device *dev,
+			      struct sysdev_attribute *attr, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
@@ -87,14 +93,16 @@ static ssize_t store_pc1event(struct sys_device *dev, const char *buf,
 	sysreg_write(PCCR, val);
 	return count;
 }
-static ssize_t show_pc1count(struct sys_device *dev, char *buf)
+static ssize_t show_pc1count(struct sys_device *dev,
+				struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pcnt1;
 
 	pcnt1 = sysreg_read(PCNT1);
 	return sprintf(buf, "%lu\n", pcnt1);
 }
-static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
+static ssize_t store_pc1count(struct sys_device *dev,
+				struct sysdev_attribute *attr, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
@@ -108,14 +116,16 @@ static ssize_t store_pc1count(struct sys_device *dev, const char *buf,
 	return count;
 }
 
-static ssize_t show_pccycles(struct sys_device *dev, char *buf)
+static ssize_t show_pccycles(struct sys_device *dev,
+				struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pccnt;
 
 	pccnt = sysreg_read(PCCNT);
 	return sprintf(buf, "%lu\n", pccnt);
 }
-static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
+static ssize_t store_pccycles(struct sys_device *dev,
+				struct sysdev_attribute *attr, const char *buf,
 			      size_t count)
 {
 	unsigned long val;
@@ -129,14 +139,16 @@ static ssize_t store_pccycles(struct sys_device *dev, const char *buf,
 	return count;
 }
 
-static ssize_t show_pcenable(struct sys_device *dev, char *buf)
+static ssize_t show_pcenable(struct sys_device *dev,
+			struct sysdev_attribute *attr, char *buf)
 {
 	unsigned long pccr;
 
 	pccr = sysreg_read(PCCR);
 	return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
 }
-static ssize_t store_pcenable(struct sys_device *dev, const char *buf,
+static ssize_t store_pcenable(struct sys_device *dev,
+			      struct sysdev_attribute *attr, const char *buf,
 			      size_t count)
 {
 	unsigned long pccr, val;