[PATCH 04/10] cpufreq: Use sizeof(*ptr) form for finding size of a struct

Viresh Kumar
2013-08-03T11:50:19Z

Chapter 14 of Documentation/CodingStyle says:

The preferred form for passing a size of a struct is the following:

p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts readability and
introduces an opportunity for a bug when the pointer variable type is changed
but the corresponding sizeof that is passed to a memory allocator is not.

This wasn't followed consistently in drivers/cpufreq, lets make it more
consistent by always following this rule.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/cpufreq/acpi-cpufreq.c | 4 ++--
drivers/cpufreq/cpufreq.c | 9 ++++-----
drivers/cpufreq/cpufreq_conservative.c | 2 +-
drivers/cpufreq/cpufreq_ondemand.c | 2 +-
drivers/cpufreq/cpufreq_stats.c | 2 +-
drivers/cpufreq/e_powersaver.c | 4 ++--
drivers/cpufreq/exynos-cpufreq.c | 2 +-
drivers/cpufreq/gx-suspmod.c | 2 +-
drivers/cpufreq/ia64-acpi-cpufreq.c | 4 ++--
drivers/cpufreq/pmac64-cpufreq.c | 5 ++---
drivers/cpufreq/powernow-k7.c | 13 ++++++-------
drivers/cpufreq/powernow-k8.c | 6 +++---
drivers/cpufreq/s3c24xx-cpufreq.c | 6 +++---
drivers/cpufreq/sparc-us2e-cpufreq.c | 5 ++---
drivers/cpufreq/sparc-us3-cpufreq.c | 5 ++---
15 files changed, 33 insertions(+), 38 deletions(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index e673670..44758ce 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -709,7 +709,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
return blacklisted;
#endif

- data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;

@@ -799,7 +799,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
goto err_unreg;
}

- data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
+ data->freq_table = kmalloc(sizeof(*data->freq_table) *
(perf->state_count+1), GFP_KERNEL);
if (!data->freq_table) {
result = -ENOMEM;
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index fd94923..47773a9 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -872,7 +872,7 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
struct cpufreq_policy new_policy;
int ret = 0;

- memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
+ memcpy(&new_policy, policy, sizeof(*policy));
/* assure that the starting sequence is run in __cpufreq_set_policy */
policy->governor = NULL;

@@ -1823,7 +1823,7 @@ int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu)
if (!cpu_policy)
return -EINVAL;

- memcpy(policy, cpu_policy, sizeof(struct cpufreq_policy));
+ memcpy(policy, cpu_policy, sizeof(*policy));

cpufreq_cpu_put(cpu_policy);
return 0;
@@ -1842,8 +1842,7 @@ static int __cpufreq_set_policy(struct cpufreq_policy *policy,
pr_debug("setting new policy for CPU %u: %u - %u kHz\n", new_policy->cpu,
new_policy->min, new_policy->max);

- memcpy(&new_policy->cpuinfo, &policy->cpuinfo,
- sizeof(struct cpufreq_cpuinfo));
+ memcpy(&new_policy->cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo));

if (new_policy->min > policy->max || new_policy->max < policy->min) {
ret = -EINVAL;
@@ -1962,7 +1961,7 @@ int cpufreq_update_policy(unsigned int cpu)
}

pr_debug("updating policy for CPU %u\n", cpu);
- memcpy(&new_policy, policy, sizeof(struct cpufreq_policy));
+ memcpy(&new_policy, policy, sizeof(*policy));
new_policy.min = policy->user_policy.min;
new_policy.max = policy->user_policy.max;
new_policy.policy = policy->user_policy.policy;
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 841e256..c400924 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -317,7 +317,7 @@ static int cs_init(struct dbs_data *dbs_data)
{
struct cs_dbs_tuners *tuners;

- tuners = kzalloc(sizeof(struct cs_dbs_tuners), GFP_KERNEL);
+ tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
return -ENOMEM;
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 47d4b69b..117278a 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -482,7 +482,7 @@ static int od_init(struct dbs_data *dbs_data)
u64 idle_time;
int cpu;

- tuners = kzalloc(sizeof(struct od_dbs_tuners), GFP_KERNEL);
+ tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
return -ENOMEM;
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index b6019b8..1fbe721 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -197,7 +197,7 @@ static int cpufreq_stats_create_table(struct cpufreq_policy *policy,
unsigned int cpu = policy->cpu;
if (per_cpu(cpufreq_stats_table, cpu))
return -EBUSY;
- stat = kzalloc(sizeof(struct cpufreq_stats), GFP_KERNEL);
+ stat = kzalloc(sizeof(*stat), GFP_KERNEL);
if ((stat) == NULL)
return -ENOMEM;

diff --git a/drivers/cpufreq/e_powersaver.c b/drivers/cpufreq/e_powersaver.c
index a60efae..de974be 100644
--- a/drivers/cpufreq/e_powersaver.c
+++ b/drivers/cpufreq/e_powersaver.c
@@ -54,7 +54,7 @@ static struct acpi_processor_performance *eps_acpi_cpu_perf;
/* Minimum necessary to get acpi_processor_get_bios_limit() working */
static int eps_acpi_init(void)
{
- eps_acpi_cpu_perf = kzalloc(sizeof(struct acpi_processor_performance),
+ eps_acpi_cpu_perf = kzalloc(sizeof(*eps_acpi_cpu_perf),
GFP_KERNEL);
if (!eps_acpi_cpu_perf)
return -ENOMEM;
@@ -366,7 +366,7 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
states = 2;

/* Allocate private data and frequency table for current cpu */
- centaur = kzalloc(sizeof(struct eps_cpu_data)
+ centaur = kzalloc(sizeof(*centaur)
+ (states + 1) * sizeof(struct cpufreq_frequency_table),
GFP_KERNEL);
if (!centaur)
diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 0d32f02..3664751 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -289,7 +289,7 @@ static int __init exynos_cpufreq_init(void)
{
int ret = -EINVAL;

- exynos_info = kzalloc(sizeof(struct exynos_dvfs_info), GFP_KERNEL);
+ exynos_info = kzalloc(sizeof(*exynos_info), GFP_KERNEL);
if (!exynos_info)
return -ENOMEM;

diff --git a/drivers/cpufreq/gx-suspmod.c b/drivers/cpufreq/gx-suspmod.c
index 3dfc99b..4f25fb6 100644
--- a/drivers/cpufreq/gx-suspmod.c
+++ b/drivers/cpufreq/gx-suspmod.c
@@ -466,7 +466,7 @@ static int __init cpufreq_gx_init(void)

pr_debug("geode suspend modulation available.\n");

- params = kzalloc(sizeof(struct gxfreq_params), GFP_KERNEL);
+ params = kzalloc(sizeof(*params), GFP_KERNEL);
if (params == NULL)
return -ENOMEM;

diff --git a/drivers/cpufreq/ia64-acpi-cpufreq.c b/drivers/cpufreq/ia64-acpi-cpufreq.c
index 573c14e..08792dd 100644
--- a/drivers/cpufreq/ia64-acpi-cpufreq.c
+++ b/drivers/cpufreq/ia64-acpi-cpufreq.c
@@ -274,7 +274,7 @@ acpi_cpufreq_cpu_init (

pr_debug("acpi_cpufreq_cpu_init\n");

- data = kzalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL);
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return (-ENOMEM);

@@ -304,7 +304,7 @@ acpi_cpufreq_cpu_init (
}

/* alloc freq_table */
- data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
+ data->freq_table = kmalloc(sizeof(*data->freq_table) *
(data->acpi_data.state_count + 1),
GFP_KERNEL);
if (!data->freq_table) {
diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c
index 7ba4234..4d7799b 100644
--- a/drivers/cpufreq/pmac64-cpufreq.c
+++ b/drivers/cpufreq/pmac64-cpufreq.c
@@ -447,9 +447,8 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpus)
if (!shdr)
goto bail_noprops;
g5_fvt_table = (struct smu_sdbp_fvt *)&shdr[1];
- ssize = (shdr->len * sizeof(u32)) -
- sizeof(struct smu_sdbp_header);
- g5_fvt_count = ssize / sizeof(struct smu_sdbp_fvt);
+ ssize = (shdr->len * sizeof(u32)) - sizeof(*shdr);
+ g5_fvt_count = ssize / sizeof(*g5_fvt_table);
g5_fvt_cur = 0;

/* Sanity checking */
diff --git a/drivers/cpufreq/powernow-k7.c b/drivers/cpufreq/powernow-k7.c
index 9558708..4687d40 100644
--- a/drivers/cpufreq/powernow-k7.c
+++ b/drivers/cpufreq/powernow-k7.c
@@ -177,7 +177,7 @@ static int get_ranges(unsigned char *pst)
unsigned int speed;
u8 fid, vid;

- powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
+ powernow_table = kzalloc((sizeof(*powernow_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table)
return -ENOMEM;
@@ -309,8 +309,7 @@ static int powernow_acpi_init(void)
goto err0;
}

- acpi_processor_perf = kzalloc(sizeof(struct acpi_processor_performance),
- GFP_KERNEL);
+ acpi_processor_perf = kzalloc(sizeof(*acpi_processor_perf), GFP_KERNEL);
if (!acpi_processor_perf) {
retval = -ENOMEM;
goto err0;
@@ -346,7 +345,7 @@ static int powernow_acpi_init(void)
goto err2;
}

- powernow_table = kzalloc((sizeof(struct cpufreq_frequency_table) *
+ powernow_table = kzalloc((sizeof(*powernow_table) *
(number_scales + 1)), GFP_KERNEL);
if (!powernow_table) {
retval = -ENOMEM;
@@ -497,7 +496,7 @@ static int powernow_decode_bios(int maxfid, int startvid)
"relevant to this CPU).\n",
psb->numpst);

- p += sizeof(struct psb_s);
+ p += sizeof(*psb);

pst = (struct pst_s *) p;

@@ -510,12 +509,12 @@ static int powernow_decode_bios(int maxfid, int startvid)
(maxfid == pst->maxfid) &&
(startvid == pst->startvid)) {
print_pst_entry(pst, j);
- p = (char *)pst + sizeof(struct pst_s);
+ p = (char *)pst + sizeof(*pst);
ret = get_ranges(p);
return ret;
} else {
unsigned int k;
- p = (char *)pst + sizeof(struct pst_s);
+ p = (char *)pst + sizeof(*pst);
for (k = 0; k < number_scales; k++)
p += 2;
}
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index c39d189..3f3c6ca 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -623,7 +623,7 @@ static int fill_powernow_table(struct powernow_k8_data *data,
if (check_pst_table(data, pst, maxvid))
return -EINVAL;

- powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
+ powernow_table = kmalloc((sizeof(*powernow_table)
* (data->numps + 1)), GFP_KERNEL);
if (!powernow_table) {
printk(KERN_ERR PFX "powernow_table memory alloc failure\n");
@@ -793,7 +793,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
}

/* fill in data->powernow_table */
- powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
+ powernow_table = kmalloc((sizeof(*powernow_table)
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
if (!powernow_table) {
pr_debug("powernow_table memory alloc failure\n");
@@ -1106,7 +1106,7 @@ static int powernowk8_cpu_init(struct cpufreq_policy *pol)
if (rc)
return -ENODEV;

- data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL);
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data) {
printk(KERN_ERR PFX "unable to alloc powernow_k8_data");
return -ENOMEM;
diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c
index 87781eb..f169ee5 100644
--- a/drivers/cpufreq/s3c24xx-cpufreq.c
+++ b/drivers/cpufreq/s3c24xx-cpufreq.c
@@ -522,7 +522,7 @@ int __init s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
/* Copy the board information so that each board can make this
* initdata. */

- ours = kzalloc(sizeof(struct s3c_cpufreq_board), GFP_KERNEL);
+ ours = kzalloc(sizeof(*ours), GFP_KERNEL);
if (ours == NULL) {
printk(KERN_ERR "%s: no memory\n", __func__);
return -ENOMEM;
@@ -615,7 +615,7 @@ static int s3c_cpufreq_build_freq(void)
size = cpu_cur.info->calc_freqtable(&cpu_cur, NULL, 0);
size++;

- ftab = kmalloc(sizeof(struct cpufreq_frequency_table) * size, GFP_KERNEL);
+ ftab = kmalloc(sizeof(*ftab) * size, GFP_KERNEL);
if (!ftab) {
printk(KERN_ERR "%s: no memory for tables\n", __func__);
return -ENOMEM;
@@ -691,7 +691,7 @@ int __init s3c_plltab_register(struct cpufreq_frequency_table *plls,
struct cpufreq_frequency_table *vals;
unsigned int size;

- size = sizeof(struct cpufreq_frequency_table) * (plls_no + 1);
+ size = sizeof(*vals) * (plls_no + 1);

vals = kmalloc(size, GFP_KERNEL);
if (vals) {
diff --git a/drivers/cpufreq/sparc-us2e-cpufreq.c b/drivers/cpufreq/sparc-us2e-cpufreq.c
index 93061a4..7c43a72 100644
--- a/drivers/cpufreq/sparc-us2e-cpufreq.c
+++ b/drivers/cpufreq/sparc-us2e-cpufreq.c
@@ -351,12 +351,11 @@ static int __init us2e_freq_init(void)
struct cpufreq_driver *driver;

ret = -ENOMEM;
- driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
+ driver = kzalloc(sizeof(*driver), GFP_KERNEL);
if (!driver)
goto err_out;

- us2e_freq_table = kzalloc(
- (NR_CPUS * sizeof(struct us2e_freq_percpu_info)),
+ us2e_freq_table = kzalloc((NR_CPUS * sizeof(*us2e_freq_table)),
GFP_KERNEL);
if (!us2e_freq_table)
goto err_out;
diff --git a/drivers/cpufreq/sparc-us3-cpufreq.c b/drivers/cpufreq/sparc-us3-cpufreq.c
index 880ee29..7f500c1 100644
--- a/drivers/cpufreq/sparc-us3-cpufreq.c
+++ b/drivers/cpufreq/sparc-us3-cpufreq.c
@@ -212,12 +212,11 @@ static int __init us3_freq_init(void)
struct cpufreq_driver *driver;

ret = -ENOMEM;
- driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
+ driver = kzalloc(sizeof(*driver), GFP_KERNEL);
if (!driver)
goto err_out;

- us3_freq_table = kzalloc(
- (NR_CPUS * sizeof(struct us3_freq_percpu_info)),
+ us3_freq_table = kzalloc((NR_CPUS * sizeof(*us3_freq_table)),
GFP_KERNEL);
if (!us3_freq_table)
goto err_out;
--
1.7.12.rc2.18.g61b472e