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authorKees Cook <keescook@chromium.org>2018-06-13 00:03:40 +0300
committerKees Cook <keescook@chromium.org>2018-06-13 02:19:22 +0300
commit6396bb221514d2876fd6dc0aa2a1f240d99b37bb (patch)
treec5c501e859b93de096b1f01160135612ed765059 /drivers/cpufreq
parent6da2ec56059c3c7a7e5f729e6349e74ace1e5c57 (diff)
downloadlinux-6396bb221514d2876fd6dc0aa2a1f240d99b37bb.tar.xz
treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This patch replaces cases of: kzalloc(a * b, gfp) with: kcalloc(a * b, gfp) as well as handling cases of: kzalloc(a * b * c, gfp) with: kzalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kzalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kzalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kzalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kzalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kzalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(char) * COUNT + COUNT , ...) | kzalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kzalloc + kcalloc ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kzalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kzalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kzalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kzalloc(C1 * C2 * C3, ...) | kzalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kzalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kzalloc(sizeof(THING) * C2, ...) | kzalloc(sizeof(TYPE) * C2, ...) | kzalloc(C1 * C2 * C3, ...) | kzalloc(C1 * C2, ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - (E1) * E2 + E1, E2 , ...) | - kzalloc + kcalloc ( - (E1) * (E2) + E1, E2 , ...) | - kzalloc + kcalloc ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/acpi-cpufreq.c4
-rw-r--r--drivers/cpufreq/arm_big_little.c2
-rw-r--r--drivers/cpufreq/cppc_cpufreq.c3
-rw-r--r--drivers/cpufreq/ia64-acpi-cpufreq.c4
-rw-r--r--drivers/cpufreq/longhaul.c4
-rw-r--r--drivers/cpufreq/pxa3xx-cpufreq.c2
-rw-r--r--drivers/cpufreq/s3c24xx-cpufreq.c2
-rw-r--r--drivers/cpufreq/sfi-cpufreq.c4
-rw-r--r--drivers/cpufreq/spear-cpufreq.c2
9 files changed, 14 insertions, 13 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 9449657d72f0..8ff1c9123834 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -759,8 +759,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
goto err_unreg;
}
- freq_table = kzalloc(sizeof(*freq_table) *
- (perf->state_count+1), GFP_KERNEL);
+ freq_table = kcalloc(perf->state_count + 1, sizeof(*freq_table),
+ GFP_KERNEL);
if (!freq_table) {
result = -ENOMEM;
goto err_unreg;
diff --git a/drivers/cpufreq/arm_big_little.c b/drivers/cpufreq/arm_big_little.c
index 1d7ef5fc1977..cf62a1f64dd7 100644
--- a/drivers/cpufreq/arm_big_little.c
+++ b/drivers/cpufreq/arm_big_little.c
@@ -280,7 +280,7 @@ static int merge_cluster_tables(void)
for (i = 0; i < MAX_CLUSTERS; i++)
count += get_table_count(freq_table[i]);
- table = kzalloc(sizeof(*table) * count, GFP_KERNEL);
+ table = kcalloc(count, sizeof(*table), GFP_KERNEL);
if (!table)
return -ENOMEM;
diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index 3464580ac3ca..a9d3eec32795 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -313,7 +313,8 @@ static int __init cppc_cpufreq_init(void)
if (acpi_disabled)
return -ENODEV;
- all_cpu_data = kzalloc(sizeof(void *) * num_possible_cpus(), GFP_KERNEL);
+ all_cpu_data = kcalloc(num_possible_cpus(), sizeof(void *),
+ GFP_KERNEL);
if (!all_cpu_data)
return -ENOMEM;
diff --git a/drivers/cpufreq/ia64-acpi-cpufreq.c b/drivers/cpufreq/ia64-acpi-cpufreq.c
index 7974a2fdb760..dd5440d3372d 100644
--- a/drivers/cpufreq/ia64-acpi-cpufreq.c
+++ b/drivers/cpufreq/ia64-acpi-cpufreq.c
@@ -241,8 +241,8 @@ acpi_cpufreq_cpu_init (
}
/* alloc freq_table */
- freq_table = kzalloc(sizeof(*freq_table) *
- (data->acpi_data.state_count + 1),
+ freq_table = kcalloc(data->acpi_data.state_count + 1,
+ sizeof(*freq_table),
GFP_KERNEL);
if (!freq_table) {
result = -ENOMEM;
diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c
index 61a4c5b08219..279bd9e9fa95 100644
--- a/drivers/cpufreq/longhaul.c
+++ b/drivers/cpufreq/longhaul.c
@@ -474,8 +474,8 @@ static int longhaul_get_ranges(void)
return -EINVAL;
}
- longhaul_table = kzalloc((numscales + 1) * sizeof(*longhaul_table),
- GFP_KERNEL);
+ longhaul_table = kcalloc(numscales + 1, sizeof(*longhaul_table),
+ GFP_KERNEL);
if (!longhaul_table)
return -ENOMEM;
diff --git a/drivers/cpufreq/pxa3xx-cpufreq.c b/drivers/cpufreq/pxa3xx-cpufreq.c
index 7acc7fa4536d..9daa2cc318bb 100644
--- a/drivers/cpufreq/pxa3xx-cpufreq.c
+++ b/drivers/cpufreq/pxa3xx-cpufreq.c
@@ -93,7 +93,7 @@ static int setup_freqs_table(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table;
int i;
- table = kzalloc((num + 1) * sizeof(*table), GFP_KERNEL);
+ table = kcalloc(num + 1, sizeof(*table), GFP_KERNEL);
if (table == NULL)
return -ENOMEM;
diff --git a/drivers/cpufreq/s3c24xx-cpufreq.c b/drivers/cpufreq/s3c24xx-cpufreq.c
index 909bd6e27639..3b291a2b0cb3 100644
--- a/drivers/cpufreq/s3c24xx-cpufreq.c
+++ b/drivers/cpufreq/s3c24xx-cpufreq.c
@@ -562,7 +562,7 @@ static int s3c_cpufreq_build_freq(void)
size = cpu_cur.info->calc_freqtable(&cpu_cur, NULL, 0);
size++;
- ftab = kzalloc(sizeof(*ftab) * size, GFP_KERNEL);
+ ftab = kcalloc(size, sizeof(*ftab), GFP_KERNEL);
if (!ftab)
return -ENOMEM;
diff --git a/drivers/cpufreq/sfi-cpufreq.c b/drivers/cpufreq/sfi-cpufreq.c
index 9767afe05da2..978770432b13 100644
--- a/drivers/cpufreq/sfi-cpufreq.c
+++ b/drivers/cpufreq/sfi-cpufreq.c
@@ -95,8 +95,8 @@ static int __init sfi_cpufreq_init(void)
if (ret)
return ret;
- freq_table = kzalloc(sizeof(*freq_table) *
- (num_freq_table_entries + 1), GFP_KERNEL);
+ freq_table = kcalloc(num_freq_table_entries + 1, sizeof(*freq_table),
+ GFP_KERNEL);
if (!freq_table) {
ret = -ENOMEM;
goto err_free_array;
diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index 195f27f9c1cb..4074e2615522 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -195,7 +195,7 @@ static int spear_cpufreq_probe(struct platform_device *pdev)
cnt = prop->length / sizeof(u32);
val = prop->value;
- freq_tbl = kzalloc(sizeof(*freq_tbl) * (cnt + 1), GFP_KERNEL);
+ freq_tbl = kcalloc(cnt + 1, sizeof(*freq_tbl), GFP_KERNEL);
if (!freq_tbl) {
ret = -ENOMEM;
goto out_put_node;