Re: [PATCH] iommu: Remove stub functions for !CONFIG_IOMMU_API
From: Ohad Ben-Cohen
Date: Mon Aug 29 2011 - 09:22:21 EST
On Mon, Aug 29, 2011 at 4:05 PM, Roedel, Joerg <Joerg.Roedel@xxxxxxx> wrote:
> So in this case you can skip this whole part when CONFIG_IOMMU_API is
> disabled
Sure, we can do something like this in the driver:
#ifdef CONFIG_IOMMU_API
int do_the_iommu_thing(..)
{
... call the IOMMU API as needed...
}
#else
int do_the_iommu_thing(..)
{
return 0;
}
#endif
Essentially, this means implementing the !CONFIG_IOMMU_API stubs in the driver.
Possible of course, but I think it's a bit neater to have that in one
place, where all drivers can use. Similar to !CONFIG_HWSPINLOCK,
!CONFIG_DEBUG_FS, ...
> This saves you even more .text size, no?
Not sure; I expect the code to be compiled out today when the IOMMU
API is called and CONFIG_IOMMU_API is not set.
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