[PATCH v3 2/3] ARM: Silence first allocation with CONFIG_ARM_MODULE_PLTS=y

Florian Fainelli
2017-05-09T23:16:09Z

On 04/27/2017 11:19 AM, Florian Fainelli wrote:
> When CONFIG_ARM_MODULE_PLTS is enabled, the first allocation using the
> module space fails, because the module is too big, and then the module
> allocation is attempted from vmalloc space. Silence the first allocation
> failure in that case by setting __GFP_NOWARN.

Russell, are you okay with this change? Do you have a preference as
which tree should carry this patch series?

Thanks

>
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
> ---
> arch/arm/kernel/module.c | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
> index 80254b47dc34..3ff571c2c71c 100644
> --- a/arch/arm/kernel/module.c
> +++ b/arch/arm/kernel/module.c
> @@ -40,8 +40,15 @@
> #ifdef CONFIG_MMU
> void *module_alloc(unsigned long size)
> {
> - void *p = __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
> - GFP_KERNEL, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
> + gfp_t gfp_mask = GFP_KERNEL;
> + void *p;
> +
> + /* Silence the initial allocation */
> + if (IS_ENABLED(CONFIG_ARM_MODULE_PLTS))
> + gfp_mask |= __GFP_NOWARN;
> +
> + p = __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
> + gfp_mask, PAGE_KERNEL_EXEC, 0, NUMA_NO_NODE,
> __builtin_return_address(0));
> if (!IS_ENABLED(CONFIG_ARM_MODULE_PLTS) || p)
> return p;
>

--
Florian