[PATCH V3 2/8] drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions

From: Joe Perches
Date: Wed Sep 16 2020 - 16:41:20 EST

Convert the various sprintf fmaily calls in sysfs device show functions
to sysfs_emit and sysfs_emit_at for PAGE_SIZE buffer safety.

Done with:

$ spatch -sp-file sysfs_emit_dev.cocci --in-place --max-width=80 .

And cocci script:

$ cat sysfs_emit_dev.cocci
@@
identifier d_show;
identifier dev, attr, buf;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
return
- sprintf(buf,
+ sysfs_emit(buf,
...);
...>
}

@@
identifier d_show;
identifier dev, attr, buf;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
return
- snprintf(buf, PAGE_SIZE,
+ sysfs_emit(buf,
...);
...>
}

@@
identifier d_show;
identifier dev, attr, buf;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
return
- scnprintf(buf, PAGE_SIZE,
+ sysfs_emit(buf,
...);
...>
}

@@
identifier d_show;
identifier dev, attr, buf;
expression chr;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
return
- strcpy(buf, chr);
+ sysfs_emit(buf, chr);
...>
}

@@
identifier d_show;
identifier dev, attr, buf;
identifier len;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
len =
- sprintf(buf,
+ sysfs_emit(buf,
...);
...>
return len;
}

@@
identifier d_show;
identifier dev, attr, buf;
identifier len;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
len =
- snprintf(buf, PAGE_SIZE,
+ sysfs_emit(buf,
...);
...>
return len;
}

@@
identifier d_show;
identifier dev, attr, buf;
identifier len;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
len =
- scnprintf(buf, PAGE_SIZE,
+ sysfs_emit(buf,
...);
...>
return len;
}

@@
identifier d_show;
identifier dev, attr, buf;
identifier len;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
<...
- len += scnprintf(buf + len, PAGE_SIZE - len,
+ len += sysfs_emit_at(buf, len,
...);
...>
return len;
}

@@
identifier d_show;
identifier dev, attr, buf;
expression chr;
@@

ssize_t d_show(struct device *dev, struct device_attribute *attr, char *buf)
{
...
- strcpy(buf, chr);
- return strlen(buf);
+ return sysfs_emit(buf, chr);
}

Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
drivers/base/arch_topology.c | 2 +-
drivers/base/cacheinfo.c | 18 ++++-----
drivers/base/core.c | 19 +++++-----
drivers/base/cpu.c | 32 ++++++++--------
drivers/base/dd.c | 2 +-
drivers/base/firmware_loader/fallback.c | 2 +-
drivers/base/memory.c | 24 ++++++------
drivers/base/node.c | 28 +++++++-------
drivers/base/platform.c | 4 +-
drivers/base/power/sysfs.c | 50 ++++++++++++-------------
drivers/base/power/wakeup_stats.c | 12 +++---
drivers/base/soc.c | 10 ++---
12 files changed, 102 insertions(+), 101 deletions(-)

diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 75f72d684294..744d4618db33 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -71,7 +71,7 @@ static ssize_t cpu_capacity_show(struct device *dev,
{
struct cpu *cpu = container_of(dev, struct cpu, dev);

- return sprintf(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));
+ return sysfs_emit(buf, "%lu\n", topology_get_cpu_scale(cpu->dev.id));
}

static void update_topology_flags_workfn(struct work_struct *work);
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index 8d553c92cd32..6a8c2b5881be 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -377,7 +377,7 @@ static ssize_t size_show(struct device *dev,
{
struct cacheinfo *this_leaf = dev_get_drvdata(dev);

- return sprintf(buf, "%uK\n", this_leaf->size >> 10);
+ return sysfs_emit(buf, "%uK\n", this_leaf->size >> 10);
}

static ssize_t shared_cpumap_show_func(struct device *dev, bool list, char *buf)
@@ -407,11 +407,11 @@ static ssize_t type_show(struct device *dev,

switch (this_leaf->type) {
case CACHE_TYPE_DATA:
- return sprintf(buf, "Data\n");
+ return sysfs_emit(buf, "Data\n");
case CACHE_TYPE_INST:
- return sprintf(buf, "Instruction\n");
+ return sysfs_emit(buf, "Instruction\n");
case CACHE_TYPE_UNIFIED:
- return sprintf(buf, "Unified\n");
+ return sysfs_emit(buf, "Unified\n");
default:
return -EINVAL;
}
@@ -425,11 +425,11 @@ static ssize_t allocation_policy_show(struct device *dev,
int n = 0;

if ((ci_attr & CACHE_READ_ALLOCATE) && (ci_attr & CACHE_WRITE_ALLOCATE))
- n = sprintf(buf, "ReadWriteAllocate\n");
+ n = sysfs_emit(buf, "ReadWriteAllocate\n");
else if (ci_attr & CACHE_READ_ALLOCATE)
- n = sprintf(buf, "ReadAllocate\n");
+ n = sysfs_emit(buf, "ReadAllocate\n");
else if (ci_attr & CACHE_WRITE_ALLOCATE)
- n = sprintf(buf, "WriteAllocate\n");
+ n = sysfs_emit(buf, "WriteAllocate\n");
return n;
}

@@ -441,9 +441,9 @@ static ssize_t write_policy_show(struct device *dev,
int n = 0;

if (ci_attr & CACHE_WRITE_THROUGH)
- n = sprintf(buf, "WriteThrough\n");
+ n = sysfs_emit(buf, "WriteThrough\n");
else if (ci_attr & CACHE_WRITE_BACK)
- n = sprintf(buf, "WriteBack\n");
+ n = sysfs_emit(buf, "WriteBack\n");
return n;
}

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 8dd753539c06..e17e8e941462 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -259,7 +259,7 @@ static ssize_t status_show(struct device *dev,
default:
status = "unknown"; break;
}
- return sprintf(buf, "%s\n", status);
+ return sysfs_emit(buf, "%s\n", status);
}
static DEVICE_ATTR_RO(status);

@@ -276,7 +276,7 @@ static ssize_t auto_remove_on_show(struct device *dev,
else
str = "never";

- return sprintf(buf, "%s\n", str);
+ return sysfs_emit(buf, "%s\n", str);
}
static DEVICE_ATTR_RO(auto_remove_on);

@@ -285,7 +285,7 @@ static ssize_t runtime_pm_show(struct device *dev,
{
struct device_link *link = to_devlink(dev);

- return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME));
+ return sysfs_emit(buf, "%d\n", !!(link->flags & DL_FLAG_PM_RUNTIME));
}
static DEVICE_ATTR_RO(runtime_pm);

@@ -294,7 +294,8 @@ static ssize_t sync_state_only_show(struct device *dev,
{
struct device_link *link = to_devlink(dev);

- return sprintf(buf, "%d\n", !!(link->flags & DL_FLAG_SYNC_STATE_ONLY));
+ return sysfs_emit(buf, "%d\n",
+ !!(link->flags & DL_FLAG_SYNC_STATE_ONLY));
}
static DEVICE_ATTR_RO(sync_state_only);

@@ -1059,7 +1060,7 @@ static ssize_t waiting_for_supplier_show(struct device *dev,
&& dev->links.need_for_probe;
mutex_unlock(&wfs_lock);
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static DEVICE_ATTR_RO(waiting_for_supplier);

@@ -1709,7 +1710,7 @@ ssize_t device_show_ulong(struct device *dev,
char *buf)
{
struct dev_ext_attribute *ea = to_ext_attr(attr);
- return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var));
+ return sysfs_emit(buf, "%lx\n", *(unsigned long *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_ulong);

@@ -1739,7 +1740,7 @@ ssize_t device_show_int(struct device *dev,
{
struct dev_ext_attribute *ea = to_ext_attr(attr);

- return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var));
+ return sysfs_emit(buf, "%d\n", *(int *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_int);

@@ -1760,7 +1761,7 @@ ssize_t device_show_bool(struct device *dev, struct device_attribute *attr,
{
struct dev_ext_attribute *ea = to_ext_attr(attr);

- return snprintf(buf, PAGE_SIZE, "%d\n", *(bool *)(ea->var));
+ return sysfs_emit(buf, "%d\n", *(bool *)(ea->var));
}
EXPORT_SYMBOL_GPL(device_show_bool);

@@ -1992,7 +1993,7 @@ static ssize_t online_show(struct device *dev, struct device_attribute *attr,
device_lock(dev);
val = !dev->offline;
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}

static ssize_t online_store(struct device *dev, struct device_attribute *attr,
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index d2136ab9b14a..232f8146a8c4 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -156,7 +156,7 @@ static ssize_t show_crash_notes(struct device *dev, struct device_attribute *att
* operation should be safe. No locking required.
*/
addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum));
- rc = sprintf(buf, "%Lx\n", addr);
+ rc = sysfs_emit(buf, "%Lx\n", addr);
return rc;
}
static DEVICE_ATTR(crash_notes, 0400, show_crash_notes, NULL);
@@ -167,7 +167,7 @@ static ssize_t show_crash_notes_size(struct device *dev,
{
ssize_t rc;

- rc = sprintf(buf, "%zu\n", sizeof(note_buf_t));
+ rc = sysfs_emit(buf, "%zu\n", sizeof(note_buf_t));
return rc;
}
static DEVICE_ATTR(crash_notes_size, 0400, show_crash_notes_size, NULL);
@@ -231,7 +231,7 @@ static struct cpu_attr cpu_attrs[] = {
static ssize_t print_cpus_kernel_max(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", NR_CPUS - 1);
+ return sysfs_emit(buf, "%d\n", NR_CPUS - 1);
}
static DEVICE_ATTR(kernel_max, 0444, print_cpus_kernel_max, NULL);

@@ -279,7 +279,7 @@ static ssize_t print_cpus_isolated(struct device *dev,

cpumask_andnot(isolated, cpu_possible_mask,
housekeeping_cpumask(HK_FLAG_DOMAIN));
- n = sprintf(buf, "%*pbl\n", cpumask_pr_args(isolated));
+ n = sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(isolated));

free_cpumask_var(isolated);

@@ -291,7 +291,7 @@ static DEVICE_ATTR(isolated, 0444, print_cpus_isolated, NULL);
static ssize_t print_cpus_nohz_full(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
+ return sysfs_emit(buf, "%*pbl\n", cpumask_pr_args(tick_nohz_full_mask));
}
static DEVICE_ATTR(nohz_full, 0444, print_cpus_nohz_full, NULL);
#endif
@@ -323,8 +323,8 @@ static ssize_t print_cpu_modalias(struct device *dev,
ssize_t n;
u32 i;

- n = sprintf(buf, "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:",
- CPU_FEATURE_TYPEVAL);
+ n = sysfs_emit(buf, "cpu:type:" CPU_FEATURE_TYPEFMT ":feature:",
+ CPU_FEATURE_TYPEVAL);

for (i = 0; i < MAX_CPU_FEATURES; i++)
if (cpu_have_feature(i)) {
@@ -516,56 +516,56 @@ static void __init cpu_dev_register_generic(void)
ssize_t __weak cpu_show_meltdown(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_spectre_v1(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_spec_store_bypass(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_l1tf(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_mds(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_tsx_async_abort(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_itlb_multihit(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

ssize_t __weak cpu_show_srbds(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "Not affected\n");
+ return sysfs_emit(buf, "Not affected\n");
}

static DEVICE_ATTR(meltdown, 0444, cpu_show_meltdown, NULL);
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 6e7319ca5bde..123a1c3e9f18 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -486,7 +486,7 @@ static ssize_t state_synced_show(struct device *dev,
device_lock(dev);
val = dev->state_synced;
device_unlock(dev);
- return sprintf(buf, "%u\n", val);
+ return sysfs_emit(buf, "%u\n", val);
}
static DEVICE_ATTR_RO(state_synced);

diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 283ca2de76d4..7e9598a1577a 100644
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -219,7 +219,7 @@ static ssize_t firmware_loading_show(struct device *dev,
loading = fw_sysfs_loading(fw_sysfs->fw_priv);
mutex_unlock(&fw_lock);

- return sprintf(buf, "%d\n", loading);
+ return sysfs_emit(buf, "%d\n", loading);
}

/**
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index b4c297dd0475..f5c0b64df2e5 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -119,7 +119,7 @@ static ssize_t phys_index_show(struct device *dev,
unsigned long phys_index;

phys_index = mem->start_section_nr / sections_per_block;
- return sprintf(buf, "%08lx\n", phys_index);
+ return sysfs_emit(buf, "%08lx\n", phys_index);
}

/*
@@ -129,7 +129,7 @@ static ssize_t phys_index_show(struct device *dev,
static ssize_t removable_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE));
+ return sysfs_emit(buf, "%d\n", (int)IS_ENABLED(CONFIG_MEMORY_HOTREMOVE));
}

/*
@@ -147,17 +147,17 @@ static ssize_t state_show(struct device *dev, struct device_attribute *attr,
*/
switch (mem->state) {
case MEM_ONLINE:
- len = sprintf(buf, "online\n");
+ len = sysfs_emit(buf, "online\n");
break;
case MEM_OFFLINE:
- len = sprintf(buf, "offline\n");
+ len = sysfs_emit(buf, "offline\n");
break;
case MEM_GOING_OFFLINE:
- len = sprintf(buf, "going-offline\n");
+ len = sysfs_emit(buf, "going-offline\n");
break;
default:
- len = sprintf(buf, "ERROR-UNKNOWN-%ld\n",
- mem->state);
+ len = sysfs_emit(buf, "ERROR-UNKNOWN-%ld\n",
+ mem->state);
WARN_ON(1);
break;
}
@@ -303,7 +303,7 @@ static ssize_t phys_device_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct memory_block *mem = to_memory_block(dev);
- return sprintf(buf, "%d\n", mem->phys_device);
+ return sysfs_emit(buf, "%d\n", mem->phys_device);
}

#ifdef CONFIG_MEMORY_HOTREMOVE
@@ -341,7 +341,7 @@ static ssize_t valid_zones_show(struct device *dev,
default_zone = test_pages_in_a_zone(start_pfn,
start_pfn + nr_pages);
if (!default_zone)
- return sprintf(buf, "none\n");
+ return sysfs_emit(buf, "none\n");
strcat(buf, default_zone->name);
goto out;
}
@@ -374,7 +374,7 @@ static DEVICE_ATTR_RO(removable);
static ssize_t block_size_bytes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%lx\n", memory_block_size_bytes());
+ return sysfs_emit(buf, "%lx\n", memory_block_size_bytes());
}

static DEVICE_ATTR_RO(block_size_bytes);
@@ -386,8 +386,8 @@ static DEVICE_ATTR_RO(block_size_bytes);
static ssize_t auto_online_blocks_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%s\n",
- online_type_to_str[memhp_default_online_type]);
+ return sysfs_emit(buf, "%s\n",
+ online_type_to_str[memhp_default_online_type]);
}

static ssize_t auto_online_blocks_store(struct device *dev,
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 9426b0f1f660..f6bde7acd5fe 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -370,7 +370,7 @@ static ssize_t node_read_meminfo(struct device *dev,
si_meminfo_node(&i, nid);
sreclaimable = node_page_state_pages(pgdat, NR_SLAB_RECLAIMABLE_B);
sunreclaimable = node_page_state_pages(pgdat, NR_SLAB_UNRECLAIMABLE_B);
- n = sprintf(buf,
+ n = sysfs_emit(buf,
"Node %d MemTotal: %8lu kB\n"
"Node %d MemFree: %8lu kB\n"
"Node %d MemUsed: %8lu kB\n"
@@ -477,19 +477,19 @@ static DEVICE_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
static ssize_t node_read_numastat(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf,
- "numa_hit %lu\n"
- "numa_miss %lu\n"
- "numa_foreign %lu\n"
- "interleave_hit %lu\n"
- "local_node %lu\n"
- "other_node %lu\n",
- sum_zone_numa_state(dev->id, NUMA_HIT),
- sum_zone_numa_state(dev->id, NUMA_MISS),
- sum_zone_numa_state(dev->id, NUMA_FOREIGN),
- sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT),
- sum_zone_numa_state(dev->id, NUMA_LOCAL),
- sum_zone_numa_state(dev->id, NUMA_OTHER));
+ return sysfs_emit(buf,
+ "numa_hit %lu\n"
+ "numa_miss %lu\n"
+ "numa_foreign %lu\n"
+ "interleave_hit %lu\n"
+ "local_node %lu\n"
+ "other_node %lu\n",
+ sum_zone_numa_state(dev->id, NUMA_HIT),
+ sum_zone_numa_state(dev->id, NUMA_MISS),
+ sum_zone_numa_state(dev->id, NUMA_FOREIGN),
+ sum_zone_numa_state(dev->id, NUMA_INTERLEAVE_HIT),
+ sum_zone_numa_state(dev->id, NUMA_LOCAL),
+ sum_zone_numa_state(dev->id, NUMA_OTHER));
}
static DEVICE_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index d90d92e63903..f0f8cfcc3621 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -1084,7 +1084,7 @@ static ssize_t driver_override_show(struct device *dev,
ssize_t len;

device_lock(dev);
- len = sprintf(buf, "%s\n", pdev->driver_override);
+ len = sysfs_emit(buf, "%s\n", pdev->driver_override);
device_unlock(dev);
return len;
}
@@ -1093,7 +1093,7 @@ static DEVICE_ATTR_RW(driver_override);
static ssize_t numa_node_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", dev_to_node(dev));
+ return sysfs_emit(buf, "%d\n", dev_to_node(dev));
}
static DEVICE_ATTR_RO(numa_node);

diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index c7b24812523c..4276b792d0aa 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -101,7 +101,7 @@ static const char ctrl_on[] = "on";
static ssize_t control_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n",
+ return sysfs_emit(buf, "%s\n",
dev->power.runtime_auto ? ctrl_auto : ctrl_on);
}

@@ -127,7 +127,7 @@ static ssize_t runtime_active_time_show(struct device *dev,
int ret;
u64 tmp = pm_runtime_active_time(dev);
do_div(tmp, NSEC_PER_MSEC);
- ret = sprintf(buf, "%llu\n", tmp);
+ ret = sysfs_emit(buf, "%llu\n", tmp);
return ret;
}

@@ -139,7 +139,7 @@ static ssize_t runtime_suspended_time_show(struct device *dev,
int ret;
u64 tmp = pm_runtime_suspended_time(dev);
do_div(tmp, NSEC_PER_MSEC);
- ret = sprintf(buf, "%llu\n", tmp);
+ ret = sysfs_emit(buf, "%llu\n", tmp);
return ret;
}

@@ -172,7 +172,7 @@ static ssize_t runtime_status_show(struct device *dev,
return -EIO;
}
}
- return sprintf(buf, p);
+ return sysfs_emit(buf, p);
}

static DEVICE_ATTR_RO(runtime_status);
@@ -182,7 +182,7 @@ static ssize_t autosuspend_delay_ms_show(struct device *dev,
{
if (!dev->power.use_autosuspend)
return -EIO;
- return sprintf(buf, "%d\n", dev->power.autosuspend_delay);
+ return sysfs_emit(buf, "%d\n", dev->power.autosuspend_delay);
}

static ssize_t autosuspend_delay_ms_store(struct device *dev,
@@ -211,11 +211,11 @@ static ssize_t pm_qos_resume_latency_us_show(struct device *dev,
s32 value = dev_pm_qos_requested_resume_latency(dev);

if (value == 0)
- return sprintf(buf, "n/a\n");
+ return sysfs_emit(buf, "n/a\n");
if (value == PM_QOS_RESUME_LATENCY_NO_CONSTRAINT)
value = 0;

- return sprintf(buf, "%d\n", value);
+ return sysfs_emit(buf, "%d\n", value);
}

static ssize_t pm_qos_resume_latency_us_store(struct device *dev,
@@ -255,11 +255,11 @@ static ssize_t pm_qos_latency_tolerance_us_show(struct device *dev,
s32 value = dev_pm_qos_get_user_latency_tolerance(dev);

if (value < 0)
- return sprintf(buf, "auto\n");
+ return sysfs_emit(buf, "auto\n");
if (value == PM_QOS_LATENCY_ANY)
- return sprintf(buf, "any\n");
+ return sysfs_emit(buf, "any\n");

- return sprintf(buf, "%d\n", value);
+ return sysfs_emit(buf, "%d\n", value);
}

static ssize_t pm_qos_latency_tolerance_us_store(struct device *dev,
@@ -291,8 +291,8 @@ static ssize_t pm_qos_no_power_off_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
- & PM_QOS_FLAG_NO_POWER_OFF));
+ return sysfs_emit(buf, "%d\n", !!(dev_pm_qos_requested_flags(dev)
+ & PM_QOS_FLAG_NO_POWER_OFF));
}

static ssize_t pm_qos_no_power_off_store(struct device *dev,
@@ -320,9 +320,9 @@ static const char _disabled[] = "disabled";
static ssize_t wakeup_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n", device_can_wakeup(dev)
- ? (device_may_wakeup(dev) ? _enabled : _disabled)
- : "");
+ return sysfs_emit(buf, "%s\n", device_can_wakeup(dev)
+ ? (device_may_wakeup(dev) ? _enabled : _disabled)
+ : "");
}

static ssize_t wakeup_store(struct device *dev, struct device_attribute *attr,
@@ -522,7 +522,7 @@ static inline int dpm_sysfs_wakeup_change_owner(struct device *dev, kuid_t kuid,
static ssize_t runtime_usage_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", atomic_read(&dev->power.usage_count));
+ return sysfs_emit(buf, "%d\n", atomic_read(&dev->power.usage_count));
}
static DEVICE_ATTR_RO(runtime_usage);

@@ -530,8 +530,8 @@ static ssize_t runtime_active_kids_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%d\n", dev->power.ignore_children ?
- 0 : atomic_read(&dev->power.child_count));
+ return sysfs_emit(buf, "%d\n", dev->power.ignore_children ?
+ 0 : atomic_read(&dev->power.child_count));
}
static DEVICE_ATTR_RO(runtime_active_kids);

@@ -539,12 +539,12 @@ static ssize_t runtime_enabled_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (dev->power.disable_depth && (dev->power.runtime_auto == false))
- return sprintf(buf, "disabled & forbidden\n");
+ return sysfs_emit(buf, "disabled & forbidden\n");
if (dev->power.disable_depth)
- return sprintf(buf, "disabled\n");
+ return sysfs_emit(buf, "disabled\n");
if (dev->power.runtime_auto == false)
- return sprintf(buf, "forbidden\n");
- return sprintf(buf, "enabled\n");
+ return sysfs_emit(buf, "forbidden\n");
+ return sysfs_emit(buf, "enabled\n");
}
static DEVICE_ATTR_RO(runtime_enabled);

@@ -552,9 +552,9 @@ static DEVICE_ATTR_RO(runtime_enabled);
static ssize_t async_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
- return sprintf(buf, "%s\n",
- device_async_suspend_enabled(dev) ?
- _enabled : _disabled);
+ return sysfs_emit(buf, "%s\n",
+ device_async_suspend_enabled(dev) ?
+ _enabled : _disabled);
}

static ssize_t async_store(struct device *dev, struct device_attribute *attr,
diff --git a/drivers/base/power/wakeup_stats.c b/drivers/base/power/wakeup_stats.c
index c7734914d914..5568e25d7c9c 100644
--- a/drivers/base/power/wakeup_stats.c
+++ b/drivers/base/power/wakeup_stats.c
@@ -42,7 +42,7 @@ static ssize_t active_time_ms_show(struct device *dev,
ktime_t active_time =
ws->active ? ktime_sub(ktime_get(), ws->last_time) : 0;

- return sprintf(buf, "%lld\n", ktime_to_ms(active_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(active_time));
}
static DEVICE_ATTR_RO(active_time_ms);

@@ -57,7 +57,7 @@ static ssize_t total_time_ms_show(struct device *dev,
active_time = ktime_sub(ktime_get(), ws->last_time);
total_time = ktime_add(total_time, active_time);
}
- return sprintf(buf, "%lld\n", ktime_to_ms(total_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(total_time));
}
static DEVICE_ATTR_RO(total_time_ms);

@@ -73,7 +73,7 @@ static ssize_t max_time_ms_show(struct device *dev,
if (active_time > max_time)
max_time = active_time;
}
- return sprintf(buf, "%lld\n", ktime_to_ms(max_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(max_time));
}
static DEVICE_ATTR_RO(max_time_ms);

@@ -82,7 +82,7 @@ static ssize_t last_change_ms_show(struct device *dev,
{
struct wakeup_source *ws = dev_get_drvdata(dev);

- return sprintf(buf, "%lld\n", ktime_to_ms(ws->last_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(ws->last_time));
}
static DEVICE_ATTR_RO(last_change_ms);

@@ -91,7 +91,7 @@ static ssize_t name_show(struct device *dev, struct device_attribute *attr,
{
struct wakeup_source *ws = dev_get_drvdata(dev);

- return sprintf(buf, "%s\n", ws->name);
+ return sysfs_emit(buf, "%s\n", ws->name);
}
static DEVICE_ATTR_RO(name);

@@ -106,7 +106,7 @@ static ssize_t prevent_suspend_time_ms_show(struct device *dev,
prevent_sleep_time = ktime_add(prevent_sleep_time,
ktime_sub(ktime_get(), ws->start_prevent_time));
}
- return sprintf(buf, "%lld\n", ktime_to_ms(prevent_sleep_time));
+ return sysfs_emit(buf, "%lld\n", ktime_to_ms(prevent_sleep_time));
}
static DEVICE_ATTR_RO(prevent_suspend_time_ms);

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index a5bae551167d..fc6536a7eac6 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -76,15 +76,15 @@ static ssize_t soc_info_get(struct device *dev,
struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);

if (attr == &dev_attr_machine)
- return sprintf(buf, "%s\n", soc_dev->attr->machine);
+ return sysfs_emit(buf, "%s\n", soc_dev->attr->machine);
if (attr == &dev_attr_family)
- return sprintf(buf, "%s\n", soc_dev->attr->family);
+ return sysfs_emit(buf, "%s\n", soc_dev->attr->family);
if (attr == &dev_attr_revision)
- return sprintf(buf, "%s\n", soc_dev->attr->revision);
+ return sysfs_emit(buf, "%s\n", soc_dev->attr->revision);
if (attr == &dev_attr_serial_number)
- return sprintf(buf, "%s\n", soc_dev->attr->serial_number);
+ return sysfs_emit(buf, "%s\n", soc_dev->attr->serial_number);
if (attr == &dev_attr_soc_id)
- return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
+ return sysfs_emit(buf, "%s\n", soc_dev->attr->soc_id);

return -EINVAL;

--
2.26.0