From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Date: Tue, 14 Aug 2018 04:45:05 +0000 Subject: Re: [PATCH 1/2] ia64: Use ARRAY_SIZE to replace its implementation Message-Id: <81ae2b1b7ea395217dbf3494457a232bdfdc79c5.camel@perches.com> List-Id: References: <1534214814-9043-1-git-send-email-zhongjiang@huawei.com> <1534214814-9043-2-git-send-email-zhongjiang@huawei.com> In-Reply-To: <1534214814-9043-2-git-send-email-zhongjiang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: zhong jiang , tony.luck@intel.com, fenghua.yu@intel.com, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, oleg@redhat.com, rppt@linux.vnet.ibm.com, dhowells@redhat.com, akpm@linux-foundation.org, viro@zeniv.linux.org.uk Cc: linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org On Tue, 2018-08-14 at 10:46 +0800, zhong jiang wrote: > We prefer to ARRAY_SIZE rather than duplicating its implementation. > So just replace it. [] > diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c [] > @@ -4645,7 +4645,7 @@ static char *pfmfs_dname(struct dentry *dentry, char *buffer, int buflen) > /* 32 */PFM_CMD(pfm_write_ibrs, PFM_CMD_PCLRWS, PFM_CMD_ARG_MANY, pfarg_dbreg_t, NULL), > /* 33 */PFM_CMD(pfm_write_dbrs, PFM_CMD_PCLRWS, PFM_CMD_ARG_MANY, pfarg_dbreg_t, NULL) > }; > -#define PFM_CMD_COUNT (sizeof(pfm_cmd_tab)/sizeof(pfm_cmd_desc_t)) > +#define PFM_CMD_COUNT ARRAY_SIZE(pfm_cmd_tab) Better would be to remove the #define altogether and change the one place where it's used to ARRAY_SIZE(...) --- arch/ia64/kernel/perfmon.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c index a9d4dc6c0427..08ece2c7b6e1 100644 --- a/arch/ia64/kernel/perfmon.c +++ b/arch/ia64/kernel/perfmon.c @@ -4645,7 +4645,6 @@ static pfm_cmd_desc_t pfm_cmd_tab[]={ /* 32 */PFM_CMD(pfm_write_ibrs, PFM_CMD_PCLRWS, PFM_CMD_ARG_MANY, pfarg_dbreg_t, NULL), /* 33 */PFM_CMD(pfm_write_dbrs, PFM_CMD_PCLRWS, PFM_CMD_ARG_MANY, pfarg_dbreg_t, NULL) }; -#define PFM_CMD_COUNT (sizeof(pfm_cmd_tab)/sizeof(pfm_cmd_desc_t)) static int pfm_check_task_state(pfm_context_t *ctx, int cmd, unsigned long flags) @@ -4770,7 +4769,7 @@ sys_perfmonctl (int fd, int cmd, void __user *arg, int count) */ if (unlikely(pmu_conf = NULL)) return -ENOSYS; - if (unlikely(cmd < 0 || cmd >= PFM_CMD_COUNT)) { + if (unlikely(cmd < 0 || cmd >= ARRAY_SIZE(pfm_cmd_tab)) { DPRINT(("invalid cmd=%d\n", cmd)); return -EINVAL; }