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, 10 insertions, 4 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index c4a7ec31394..e6a4d5f6764 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -762,10 +762,14 @@ DEFINE_PER_CPU(struct sys_device, device_mce);
 
 /* Why are there no generic functions for this? */
 #define ACCESSOR(name, var, start) \
-        static ssize_t show_ ## name(struct sys_device *s, char *buf) { \
+        static ssize_t show_ ## name(struct sys_device *s,              \
+                                     struct sysdev_attribute *attr,     \
+                                     char *buf) {                       \
                 return sprintf(buf, "%lx\n", (unsigned long)var);       \
         }                                                               \
-        static ssize_t set_ ## name(struct sys_device *s,const char *buf,size_t siz) { \
+        static ssize_t set_ ## name(struct sys_device *s,               \
+                                    struct sysdev_attribute *attr,      \
+                                    const char *buf, size_t siz) {      \
                 char *end;                                              \
                 unsigned long new = simple_strtoul(buf, &end, 0);       \
                 if (end == buf) return -EINVAL;                         \
@@ -786,14 +790,16 @@ ACCESSOR(bank3ctl,bank[3],mce_restart())
 ACCESSOR(bank4ctl,bank[4],mce_restart())
 ACCESSOR(bank5ctl,bank[5],mce_restart())
 
-static ssize_t show_trigger(struct sys_device *s, char *buf)
+static ssize_t show_trigger(struct sys_device *s, struct sysdev_attribute *attr,
+                                char *buf)
 {
         strcpy(buf, trigger);
         strcat(buf, "\n");
         return strlen(trigger) + 1;
 }
 
-static ssize_t set_trigger(struct sys_device *s,const char *buf,size_t siz)
+static ssize_t set_trigger(struct sys_device *s, struct sysdev_attribute *attr,
+                                const char *buf,size_t siz)
 {
         char *p;
         int len;