From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen Gang Subject: [PATCH next] drivers: net: wireless: ath: wil6210: debugfs: Use 'uint64_t' instead of 'cycles_t' to avoid warnings Date: Wed, 24 Dec 2014 22:29:44 +0800 Message-ID: <549ACDD8.2090506@sunrus.com.cn> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-wireless@vger.kernel.org, wil6210@qca.qualcomm.com, "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" To: qca_vkondrat@qca.qualcomm.com, kvalo@codeaurora.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org do_div() checks the type strictly. 'cycles_t' may be 32-bit under quite a few architectures (parisc, arm, avr32 ...). So use 'uint64_t' instead of, the related warning (with allmodconfig undr parisc): CC [M] drivers/net/wireless/ath/wil6210/debugfs.o In file included from arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:124, from include/linux/list.h:8, from include/linux/module.h:9, from drivers/net/wireless/ath/wil6210/debugfs.c:17: drivers/net/wireless/ath/wil6210/debugfs.c: In function =E2=80=98wil_vring_debugfs_show=E2=80=99: include/asm-generic/div64.h:43:28: warning: comparison of distinct pointer types lacks a cast (void)(((typeof((n)) *)0) =3D=3D ((uint64_t *)0)); \ ^ drivers/net/wireless/ath/wil6210/debugfs.c:107:4: note: in expansion of macro =E2=80=98do_div=E2=80=99 do_div(idle, total); ^ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from ./include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/list.h:4, from include/linux/module.h:9, from drivers/net/wireless/ath/wil6210/debugfs.c:17: include/asm-generic/div64.h:44:18: warning: right shift count >=3D wi= dth of type [-Wshift-count-overflow] if (likely(((n) >> 32) =3D=3D 0)) { \ ^ include/linux/compiler.h:159:40: note: in definition of macro =E2=80=98= likely=E2=80=99 # define likely(x) __builtin_expect(!!(x), 1) ^ drivers/net/wireless/ath/wil6210/debugfs.c:107:4: note: in expansion of macro =E2=80=98do_div=E2=80=99 do_div(idle, total); ^ In file included from arch/parisc/include/generated/asm/div64.h:1:0, from include/linux/kernel.h:124, from include/linux/list.h:8, from include/linux/module.h:9, from drivers/net/wireless/ath/wil6210/debugfs.c:17: include/asm-generic/div64.h:48:22: warning: passing argument 1 of =E2=80=98__div64_32=E2=80=99 from incompatible pointer type [-Wincompat= ible-pointer-types] __rem =3D __div64_32(&(n), __base); \ ^ drivers/net/wireless/ath/wil6210/debugfs.c:107:4: note: in expansion of macro =E2=80=98do_div=E2=80=99 do_div(idle, total); ^ include/asm-generic/div64.h:35:17: note: expected =E2=80=98uint64_t *= {aka long long unsigned int *}=E2=80=99 but argument is of type =E2=80=98cyc= les_t * {aka long unsigned int *}=E2=80=99 extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor); ^ Signed-off-by: Chen Gang --- drivers/net/wireless/ath/wil6210/debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/debugfs.c b/drivers/net/wireless/ath/wil6210/debugfs.c index 4e6e145..cd991fa 100644 --- a/drivers/net/wireless/ath/wil6210/debugfs.c +++ b/drivers/net/wireless/ath/wil6210/debugfs.c @@ -101,8 +101,8 @@ static int wil_vring_debugfs_show(struct seq_file *s, void *data) char name[10]; /* performance monitoring */ cycles_t now =3D get_cycles(); - cycles_t idle =3D txdata->idle * 100; - cycles_t total =3D now - txdata->begin; + uint64_t idle =3D txdata->idle * 100; + uint64_t total =3D now - txdata->begin; do_div(idle, total); txdata->begin =3D now; --=20 1.7.9.5