One-element arrays are being deprecated[1]. Replace the one-element array with a simple object of type compat_caddr_t: 'compat_caddr_t unused'[2], once it seems this field is actually never used.
Also, update struct cdrom_generic_command in UAPI by adding an anonimous union to avoid using the one-element array _reserved_. [1] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays [2] https://github.com/KSPP/linux/issues/86 Build-tested-by: kernel test robot <[email protected]> Link: https://lore.kernel.org/lkml/5f76f5d0.qj4t%2fhwurzsw7bta%[email protected]/ Signed-off-by: Gustavo A. R. Silva <[email protected]> --- block/scsi_ioctl.c | 6 +++--- include/uapi/linux/cdrom.h | 5 ++++- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index 600e38cb69b2..2dfb699389df 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -643,7 +643,7 @@ struct compat_cdrom_generic_command { unsigned char data_direction; compat_int_t quiet; compat_int_t timeout; - compat_caddr_t reserved[1]; + compat_caddr_t unused; }; #endif @@ -665,7 +665,7 @@ static int scsi_get_cdrom_generic_arg(struct cdrom_generic_command *cgc, .data_direction = cgc32.data_direction, .quiet = cgc32.quiet, .timeout = cgc32.timeout, - .reserved[0] = compat_ptr(cgc32.reserved[0]), + .unused = compat_ptr(cgc32.unused), }; memcpy(&cgc->cmd, &cgc32.cmd, CDROM_PACKET_SIZE); return 0; @@ -690,7 +690,7 @@ static int scsi_put_cdrom_generic_arg(const struct cdrom_generic_command *cgc, .data_direction = cgc->data_direction, .quiet = cgc->quiet, .timeout = cgc->timeout, - .reserved[0] = (uintptr_t)(cgc->reserved[0]), + .unused = (uintptr_t)(cgc->unused), }; memcpy(&cgc32.cmd, &cgc->cmd, CDROM_PACKET_SIZE); diff --git a/include/uapi/linux/cdrom.h b/include/uapi/linux/cdrom.h index 2817230148fd..6c34f6e2f1f7 100644 --- a/include/uapi/linux/cdrom.h +++ b/include/uapi/linux/cdrom.h @@ -289,7 +289,10 @@ struct cdrom_generic_command unsigned char data_direction; int quiet; int timeout; - void __user *reserved[1]; /* unused, actually */ + union { + void __user *reserved[1]; /* unused, actually */ + void __user *unused; + }; }; /* -- 2.27.0
