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Question about pte_alloc()

hi all,

it appears from the code that pte_alloc() might block since it allocates
a page table with GFP_KERNEL if the page table doesnt already exist. i
need to call pte_alloc() at interrupt time. Basically i want to map some
kernel memory into user space as soon as the device gives me data. will
there be any problem if i use another version of pte_alloc() which calls
with GFP_ATOMIC priority?
Maybe i am completely lost :-)

cheers
joy

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