zram: deprecate zram attrs sysfs nodes

[mirror_ubuntu-artful-kernel.git] / drivers / block / zram / zram_drv.c

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index c94a1a98e30186078eb9af9e49d5a2cbcc72dc0b..4491787095a00f345427b73217a9ee8376dafdf2 100644 (file)
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -43,11 +43,22 @@ static const char *default_compressor = "lzo";
 /* Module params (documentation at end) */
 static unsigned int num_devices = 1;
 
+static inline void deprecated_attr_warn(const char *name)
+{
+       pr_warn_once("%d (%s) Attribute %s (and others) will be removed. %s\n",
+                       task_pid_nr(current),
+                       current->comm,
+                       name,
+                       "See zram documentation.");
+}
+
 #define ZRAM_ATTR_RO(name)                                             \
 static ssize_t name##_show(struct device *d,           \
                                struct device_attribute *attr, char *b) \
 {                                                                      \
        struct zram *zram = dev_to_zram(d);                             \
+                                                                       \
+       deprecated_attr_warn(__stringify(name));                        \
        return scnprintf(b, PAGE_SIZE, "%llu\n",                        \
                (u64)atomic64_read(&zram->stats.name));                 \
 }                                                                      \
@@ -89,6 +100,7 @@ static ssize_t orig_data_size_show(struct device *dev,
 {
        struct zram *zram = dev_to_zram(dev);
 
+       deprecated_attr_warn("orig_data_size");
        return scnprintf(buf, PAGE_SIZE, "%llu\n",
                (u64)(atomic64_read(&zram->stats.pages_stored)) << PAGE_SHIFT);
 }
@@ -99,6 +111,7 @@ static ssize_t mem_used_total_show(struct device *dev,
        u64 val = 0;
        struct zram *zram = dev_to_zram(dev);
 
+       deprecated_attr_warn("mem_used_total");
        down_read(&zram->init_lock);
        if (init_done(zram)) {
                struct zram_meta *meta = zram->meta;
@@ -128,6 +141,7 @@ static ssize_t mem_limit_show(struct device *dev,
        u64 val;
        struct zram *zram = dev_to_zram(dev);
 
+       deprecated_attr_warn("mem_limit");
        down_read(&zram->init_lock);
        val = zram->limit_pages;
        up_read(&zram->init_lock);
@@ -159,6 +173,7 @@ static ssize_t mem_used_max_show(struct device *dev,
        u64 val = 0;
        struct zram *zram = dev_to_zram(dev);
 
+       deprecated_attr_warn("mem_used_max");
        down_read(&zram->init_lock);
        if (init_done(zram))
                val = atomic_long_read(&zram->stats.max_used_pages);