RE: [ANNOUNCE][PATCH 2.6.11 2/3] megaraid_sas: Announcing new mod ule for LSI Logic's SAS based MegaRAID controllers
From: Bagalkote, Sreenivas
Date: Wed Mar 09 2005 - 09:51:52 EST
>> I will make this an instance parameter if the idea to reduce as many
>> global variables as possible. But if the objection is because each
>> may have different value for variable, then it is indeed a global
>> "is_dma64" - which is computed using the size of dma_addr_t - is
>> something about the kernel rather than the controller feature.
>then having it as variable sounds really really wrong; the size of
>dma_addr_t is a compile time property...
>(and why do you care about it? you see high dma addresses when
During the module load time, I allocate 32 bit or 64 bit SGLs based on
whether I can receive 64 bit DMA addresses or not. If size of dma_addr_t
is 4, then I allocate only 32 bit SGLs. During the run time, I prepare
32/64 bit SGLs based on this variable. And since this is compile time
system-wide property, I kept it as driver global.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/