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| author | Nathan Chancellor <natechancellor@gmail.com> | 2019-02-18 20:22:40 -0700 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-02-20 16:24:20 +0100 |
| commit | 56410c0cb43e26a94af094aceab45a5ea38a1a38 (patch) | |
| tree | 931aff2d55fca1f89228d1a7550aa01c9a6b219b /drivers/char | |
| parent | 50ceca6894adb834126ae644920902473bdc2d33 (diff) | |
| download | lwn-56410c0cb43e26a94af094aceab45a5ea38a1a38.tar.gz lwn-56410c0cb43e26a94af094aceab45a5ea38a1a38.zip | |
hwrng: optee: Initialize some structs using memset instead of braces
Clang warns:
drivers/char/hw_random/optee-rng.c:80:31: warning: suggest braces around
initialization of subobject [-Wmissing-braces]
struct tee_param param[4] = {0};
^
{}
drivers/char/hw_random/optee-rng.c:177:31: warning: suggest braces
around initialization of subobject [-Wmissing-braces]
struct tee_param param[4] = {0};
^
{}
drivers/char/hw_random/optee-rng.c:212:48: warning: suggest braces
around initialization of subobject [-Wmissing-braces]
struct tee_ioctl_open_session_arg sess_arg = {0};
^
{}
3 warnings generated.
One way to fix these warnings is to add additional braces like Clang
suggests; however, there has been a bit of push back from some
maintainers, who just prefer memset as it is unambiguous, doesn't
depend on a particular compiler version, and properly initializes all
subobjects [1][2]. Do that here so there are no more warnings.
[1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9684@amd.com/
[2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/
Fixes: 5fe8b1cc6a03 ("hwrng: add OP-TEE based rng driver")
Link: https://github.com/ClangBuiltLinux/linux/issues/369
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/optee-rng.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/char/hw_random/optee-rng.c b/drivers/char/hw_random/optee-rng.c index 2b9fc8ac5500..46f4bcd28c41 100644 --- a/drivers/char/hw_random/optee-rng.c +++ b/drivers/char/hw_random/optee-rng.c @@ -76,8 +76,11 @@ static size_t get_optee_rng_data(struct optee_rng_private *pvt_data, u32 ret = 0; u8 *rng_data = NULL; size_t rng_size = 0; - struct tee_ioctl_invoke_arg inv_arg = {0}; - struct tee_param param[4] = {0}; + struct tee_ioctl_invoke_arg inv_arg; + struct tee_param param[4]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); /* Invoke TA_CMD_GET_ENTROPY function of Trusted App */ inv_arg.func = TA_CMD_GET_ENTROPY; @@ -173,8 +176,11 @@ static struct optee_rng_private pvt_data = { static int get_optee_rng_info(struct device *dev) { u32 ret = 0; - struct tee_ioctl_invoke_arg inv_arg = {0}; - struct tee_param param[4] = {0}; + struct tee_ioctl_invoke_arg inv_arg; + struct tee_param param[4]; + + memset(&inv_arg, 0, sizeof(inv_arg)); + memset(¶m, 0, sizeof(param)); /* Invoke TA_CMD_GET_RNG_INFO function of Trusted App */ inv_arg.func = TA_CMD_GET_RNG_INFO; @@ -209,7 +215,9 @@ static int optee_rng_probe(struct device *dev) { struct tee_client_device *rng_device = to_tee_client_device(dev); int ret = 0, err = -ENODEV; - struct tee_ioctl_open_session_arg sess_arg = {0}; + struct tee_ioctl_open_session_arg sess_arg; + + memset(&sess_arg, 0, sizeof(sess_arg)); /* Open context with TEE driver */ pvt_data.ctx = tee_client_open_context(NULL, optee_ctx_match, NULL, |