On 04/11/2018 09:26 AM, David Howells wrote:
> Provided an annotation for module parameters that specify hardware
> parameters (such as io ports, iomem addresses, irqs, dma channels, fixed
> dma buffers and other types).
>
> Suggested-by: Alan Cox <gnomes@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
> ---
>
> kernel/params.c | 26 +++++++++++++++++++++-----
> 1 file changed, 21 insertions(+), 5 deletions(-)
>
> diff --git a/kernel/params.c b/kernel/params.c
> index cc9108c2a1fd..2c08c4aa376b 100644
> --- a/kernel/params.c
> +++ b/kernel/params.c
> @@ -108,13 +108,19 @@ bool parameq(const char *a, const char *b)
> return parameqn(a, b, strlen(a)+1);
> }
>
> -static void param_check_unsafe(const struct kernel_param *kp)
> +static bool param_check_unsafe(const struct kernel_param *kp,
> + const char *doing)
> {
> if (kp->flags & KERNEL_PARAM_FL_UNSAFE) {
> pr_warn("Setting dangerous option %s - tainting kernel\n",
> kp->name);
> add_taint(TAINT_USER, LOCKDEP_STILL_OK);
> }
> +
> + if (kp->flags & KERNEL_PARAM_FL_HWPARAM &&
> + kernel_is_locked_down("Command line-specified device addresses, irqs and dma channels"))
s/dma/DMA/
Other patches use PCI instead of pci, CIS instead of cis, MMIO instead of mmio,
BPF instead of bpf, MSR instead of msr, etc...
> + return false;
> + return true;
> }
>
> static int parse_one(char *param,
--
~Randy
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