From c1248638f8c35b74400efa7e02e78ecda23373f9 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Thu, 16 May 2024 13:56:23 +0200 Subject: [PATCH] s390/zcrypt: Use kvcalloc() instead of kvmalloc_array() sparse warns about a large memset() call within zcrypt_device_status_mask_ext(): drivers/s390/crypto/zcrypt_api.c:1303:15: warning: memset with byte count of 262144 Get rid of this warning by making sure that all callers of this function allocate memory with __GFP_ZERO, which zeroes memory already at allocation time, which again allows to remove the memset() call. Reviewed-by: Harald Freudenberger Signed-off-by: Heiko Carstens --- drivers/s390/crypto/zcrypt_api.c | 9 +++------ drivers/s390/crypto/zcrypt_ccamisc.c | 12 ++++++------ drivers/s390/crypto/zcrypt_ep11misc.c | 6 +++--- 3 files changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index eba07f8ef308..74036886ca87 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -1300,9 +1300,6 @@ void zcrypt_device_status_mask_ext(struct zcrypt_device_status_ext *devstatus) struct zcrypt_device_status_ext *stat; int card, queue; - memset(devstatus, 0, MAX_ZDEV_ENTRIES_EXT - * sizeof(struct zcrypt_device_status_ext)); - spin_lock(&zcrypt_list_lock); for_each_zcrypt_card(zc) { for_each_zcrypt_queue(zq, zc) { @@ -1607,9 +1604,9 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, size_t total_size = MAX_ZDEV_ENTRIES_EXT * sizeof(struct zcrypt_device_status_ext); - device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, - sizeof(struct zcrypt_device_status_ext), - GFP_KERNEL); + device_status = kvcalloc(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); if (!device_status) return -ENOMEM; zcrypt_device_status_mask_ext(device_status); diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c index 6087547328ce..7bef2cc4e461 100644 --- a/drivers/s390/crypto/zcrypt_ccamisc.c +++ b/drivers/s390/crypto/zcrypt_ccamisc.c @@ -1762,9 +1762,9 @@ static int findcard(u64 mkvp, u16 *pcardnr, u16 *pdomain, return -EINVAL; /* fetch status of all crypto cards */ - device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, - sizeof(struct zcrypt_device_status_ext), - GFP_KERNEL); + device_status = kvcalloc(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); if (!device_status) return -ENOMEM; zcrypt_device_status_mask_ext(device_status); @@ -1878,9 +1878,9 @@ int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain, struct cca_info ci; /* fetch status of all crypto cards */ - device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, - sizeof(struct zcrypt_device_status_ext), - GFP_KERNEL); + device_status = kvcalloc(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); if (!device_status) return -ENOMEM; zcrypt_device_status_mask_ext(device_status); diff --git a/drivers/s390/crypto/zcrypt_ep11misc.c b/drivers/s390/crypto/zcrypt_ep11misc.c index 9bcf8fc69ebe..b43db17a4e0e 100644 --- a/drivers/s390/crypto/zcrypt_ep11misc.c +++ b/drivers/s390/crypto/zcrypt_ep11misc.c @@ -1588,9 +1588,9 @@ int ep11_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain, struct ep11_card_info eci; /* fetch status of all crypto cards */ - device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, - sizeof(struct zcrypt_device_status_ext), - GFP_KERNEL); + device_status = kvcalloc(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); if (!device_status) return -ENOMEM; zcrypt_device_status_mask_ext(device_status);