powerpc/mm: Match variable types to API
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 <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Joe MacDonald <joe.macdonald@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
index e4f8f1f..7c415dd 100644
--- a/arch/powerpc/mm/subpage-prot.c
+++ b/arch/powerpc/mm/subpage-prot.c
@@ -95,7 +95,8 @@
struct mm_struct *mm = current->mm;
struct subpage_prot_table *spt = &mm->context.spt;
u32 **spm, *spp;
- int i, nw;
+ unsigned long i;
+ size_t nw;
unsigned long next, limit;
down_write(&mm->mmap_sem);
@@ -144,7 +145,8 @@
struct mm_struct *mm = current->mm;
struct subpage_prot_table *spt = &mm->context.spt;
u32 **spm, *spp;
- int i, nw;
+ unsigned long i;
+ size_t nw;
unsigned long next, limit;
int err;