On 04/13/2018 06:11 PM, Laura Abbott wrote:
> There's an ongoing effort to remove VLAs[1] from the kernel to eventually
> turn on -Wvla. The few VLAs in use have an upper bound based on a size
> of 64K. This doesn't produce an excessively large stack so just switch
> the upper bound.
>
> [1] https://lkml.org/lkml/2018/3/7/621
>
> Signed-off-by: Laura Abbott <labb...@redhat.com>
> ---
> arch/x86/xen/enlighten_pv.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
> index c36d23aa6c35..d96a5a535cbb 100644
> --- a/arch/x86/xen/enlighten_pv.c
> +++ b/arch/x86/xen/enlighten_pv.c
> @@ -421,8 +421,7 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
> {
> unsigned long va = dtr->address;
> unsigned int size = dtr->size + 1;
> - unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
Isn't dtr->size always either GDT_SIZE or 0?
-boris
> - unsigned long frames[pages];
> + unsigned long frames[DIV_ROUND_UP(SZ_64K, PAGE_SIZE)];
> int f;
>
> /*
> @@ -470,8 +469,7 @@ static void __init xen_load_gdt_boot(const struct
> desc_ptr *dtr)
> {
> unsigned long va = dtr->address;
> unsigned int size = dtr->size + 1;
> - unsigned pages = DIV_ROUND_UP(size, PAGE_SIZE);
> - unsigned long frames[pages];
> + unsigned long frames[DIV_ROUND_UP(SZ_64K, PAGE_SIZE)];
> int f;
>
> /*
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