On Tue, Aug 21, 2012 at 02:22:28PM -0400, Paul Gortmaker wrote:
From: Joe MacDonald <redacted>
sys_subpage_prot() takes an unsigned long for 'addr' then does some stuff
with it and the result is stored in a signed int, i, which is eventually
used as the size parameter in a copy_from_user call. Update 'i' to be an
unsigned long as well and since 'nw' is used in a size_t context which,
depending on whether this is 32- or 64-bit may be unsigned int or unsigned
long, switch that to a size_t and always be right.
Finally, since we're in the neighbourhood, make the same changes to
subpage_prot_clear().
Cc: Paul Mackerras <redacted>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Joe MacDonald <redacted>
Signed-off-by: Paul Gortmaker <redacted>
This change won't hurt; in fact it won't make any difference since (a)
this code is only ever used on 64-bit and (b) i and nw are restricted
to the range 0 .. PTRS_PER_PTE - 1, but I agree the code is slightly
cleaner this way.
Acked-by: Paul Mackerras <redacted>