From: SF Markus Elfring <elfring@users.sourceforge.net> To: sparclinux@vger.kernel.org, "David S. Miller" <davem@davemloft.net> Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org, Julia Lawall <julia.lawall@lip6.fr>, Paolo Bonzini <pbonzini@redhat.com> Subject: [PATCH 1/2] sparc: Use kmalloc_array() in three functions Date: Thu, 25 Aug 2016 10:22:48 +0200 [thread overview] Message-ID: <fbdf6d83-08ac-a6b2-1674-53bc86c69ae8@users.sourceforge.net> (raw) In-Reply-To: <0ca0235c-ddb9-0534-3bde-b4aaa48da92e@users.sourceforge.net> From: Markus Elfring <elfring@users.sourceforge.net> Date: Thu, 25 Aug 2016 09:52:44 +0200 * Multiplications for the size determination of memory allocations indicated that array data structures should be processed. Thus reuse the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. * Replace the specifications of data types by pointer dereferences to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> --- arch/sparc/kernel/led.c | 2 +- arch/sparc/kernel/nmi.c | 4 +++- arch/sparc/kernel/sys_sparc_64.c | 6 ++++-- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/sparc/kernel/led.c b/arch/sparc/kernel/led.c index 3ae36f3..7444e4a 100644 --- a/arch/sparc/kernel/led.c +++ b/arch/sparc/kernel/led.c @@ -69,7 +69,7 @@ static ssize_t led_proc_write(struct file *file, const char __user *buffer, if (count > LED_MAX_LENGTH) count = LED_MAX_LENGTH; - buf = kmalloc(sizeof(char) * (count + 1), GFP_KERNEL); + buf = kmalloc_array(count + 1, sizeof(*buf), GFP_KERNEL); if (!buf) return -ENOMEM; diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index a9973bb..b88e97b 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -166,7 +166,9 @@ static int __init check_nmi_watchdog(void) if (!atomic_read(&nmi_active)) return 0; - prev_nmi_count = kmalloc(nr_cpu_ids * sizeof(unsigned int), GFP_KERNEL); + prev_nmi_count = kmalloc_array(nr_cpu_ids, + sizeof(*prev_nmi_count), + GFP_KERNEL); if (!prev_nmi_count) { err = -ENOMEM; goto error; diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index fe8b8ee..25b7a14 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -580,8 +580,10 @@ SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type, unsigned long *p = current_thread_info()->utraps; current_thread_info()->utraps = - kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), - GFP_KERNEL); + kmalloc_array(UT_TRAP_INSTRUCTION_31 + 1, + sizeof(*current_thread_info() + ->utraps), + GFP_KERNEL); if (!current_thread_info()->utraps) { current_thread_info()->utraps = p; return -ENOMEM; -- 2.9.3
WARNING: multiple messages have this Message-ID (diff)
From: SF Markus Elfring <elfring@users.sourceforge.net> To: sparclinux@vger.kernel.org, "David S. Miller" <davem@davemloft.net> Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org, Julia Lawall <julia.lawall@lip6.fr>, Paolo Bonzini <pbonzini@redhat.com> Subject: [PATCH 1/2] sparc: Use kmalloc_array() in three functions Date: Thu, 25 Aug 2016 08:22:48 +0000 [thread overview] Message-ID: <fbdf6d83-08ac-a6b2-1674-53bc86c69ae8@users.sourceforge.net> (raw) In-Reply-To: <0ca0235c-ddb9-0534-3bde-b4aaa48da92e@users.sourceforge.net> From: Markus Elfring <elfring@users.sourceforge.net> Date: Thu, 25 Aug 2016 09:52:44 +0200 * Multiplications for the size determination of memory allocations indicated that array data structures should be processed. Thus reuse the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. * Replace the specifications of data types by pointer dereferences to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> --- arch/sparc/kernel/led.c | 2 +- arch/sparc/kernel/nmi.c | 4 +++- arch/sparc/kernel/sys_sparc_64.c | 6 ++++-- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/sparc/kernel/led.c b/arch/sparc/kernel/led.c index 3ae36f3..7444e4a 100644 --- a/arch/sparc/kernel/led.c +++ b/arch/sparc/kernel/led.c @@ -69,7 +69,7 @@ static ssize_t led_proc_write(struct file *file, const char __user *buffer, if (count > LED_MAX_LENGTH) count = LED_MAX_LENGTH; - buf = kmalloc(sizeof(char) * (count + 1), GFP_KERNEL); + buf = kmalloc_array(count + 1, sizeof(*buf), GFP_KERNEL); if (!buf) return -ENOMEM; diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c index a9973bb..b88e97b 100644 --- a/arch/sparc/kernel/nmi.c +++ b/arch/sparc/kernel/nmi.c @@ -166,7 +166,9 @@ static int __init check_nmi_watchdog(void) if (!atomic_read(&nmi_active)) return 0; - prev_nmi_count = kmalloc(nr_cpu_ids * sizeof(unsigned int), GFP_KERNEL); + prev_nmi_count = kmalloc_array(nr_cpu_ids, + sizeof(*prev_nmi_count), + GFP_KERNEL); if (!prev_nmi_count) { err = -ENOMEM; goto error; diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index fe8b8ee..25b7a14 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -580,8 +580,10 @@ SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type, unsigned long *p = current_thread_info()->utraps; current_thread_info()->utraps - kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), - GFP_KERNEL); + kmalloc_array(UT_TRAP_INSTRUCTION_31 + 1, + sizeof(*current_thread_info() + ->utraps), + GFP_KERNEL); if (!current_thread_info()->utraps) { current_thread_info()->utraps = p; return -ENOMEM; -- 2.9.3
next prev parent reply other threads:[~2016-08-25 8:24 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-25 8:20 [PATCH 0/2] sparc: Fine-tuning for three function implementations SF Markus Elfring 2016-08-25 8:20 ` SF Markus Elfring 2016-08-25 8:22 ` SF Markus Elfring [this message] 2016-08-25 8:22 ` [PATCH 1/2] sparc: Use kmalloc_array() in three functions SF Markus Elfring 2016-08-29 9:47 ` Paolo Bonzini 2016-08-29 9:47 ` Paolo Bonzini 2016-08-29 10:36 ` SF Markus Elfring 2016-08-29 10:36 ` SF Markus Elfring 2016-08-29 11:57 ` walter harms 2016-08-29 11:57 ` walter harms 2016-08-29 16:38 ` Paolo Bonzini 2016-08-29 16:38 ` Paolo Bonzini 2016-08-25 8:24 ` [PATCH 2/2] sparc: Delete an unnecessary initialisation in led_proc_write() SF Markus Elfring 2016-08-25 8:24 ` SF Markus Elfring
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