[PATCH] psi: convert to DEFINE_SHOW_ATTRIBUTE

[Yangtao Li]

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.

Signed-off-by: Yangtao Li <tiny.win...@gmail.com>
---
 kernel/sched/psi.c | 39 +++------------------------------------
 1 file changed, 3 insertions(+), 36 deletions(-)

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index fe24de3fbc93..8d13210f88f4 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -714,52 +714,19 @@ static int psi_io_show(struct seq_file *m, void *v)
 {
        return psi_show(m, &psi_system, PSI_IO);
 }
+DEFINE_SHOW_ATTRIBUTE(psi_io);
 
 static int psi_memory_show(struct seq_file *m, void *v)
 {
        return psi_show(m, &psi_system, PSI_MEM);
 }
+DEFINE_SHOW_ATTRIBUTE(psi_memory);
 
 static int psi_cpu_show(struct seq_file *m, void *v)
 {
        return psi_show(m, &psi_system, PSI_CPU);
 }
-
-static int psi_io_open(struct inode *inode, struct file *file)
-{
-       return single_open(file, psi_io_show, NULL);
-}
-
-static int psi_memory_open(struct inode *inode, struct file *file)
-{
-       return single_open(file, psi_memory_show, NULL);
-}
-
-static int psi_cpu_open(struct inode *inode, struct file *file)
-{
-       return single_open(file, psi_cpu_show, NULL);
-}
-
-static const struct file_operations psi_io_fops = {
-       .open           = psi_io_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
-
-static const struct file_operations psi_memory_fops = {
-       .open           = psi_memory_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
-
-static const struct file_operations psi_cpu_fops = {
-       .open           = psi_cpu_open,
-       .read           = seq_read,
-       .llseek         = seq_lseek,
-       .release        = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(psi_cpu);
 
 static int __init psi_proc_init(void)
 {
-- 
2.17.0