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authorJoe MacDonald <joe.macdonald@windriver.com>2012-08-21 08:22:28 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-09-10 14:37:31 +1000
commit6b5e7229bbd59f0cfce7015fd46736fc93d8c8c3 (patch)
tree123e1d096d08b19db3ec32e9272a8a81335fdc7c /arch/powerpc
parent11f63d3fb9c4257b1f005db8d11deba9f992bdf6 (diff)
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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/mm/subpage-prot.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
index e4f8f1fc81a5..7c415ddde948 100644
--- a/arch/powerpc/mm/subpage-prot.c
+++ b/arch/powerpc/mm/subpage-prot.c
@@ -95,7 +95,8 @@ static void subpage_prot_clear(unsigned long addr, unsigned long len)
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 @@ long sys_subpage_prot(unsigned long addr, unsigned long len, u32 __user *map)
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;