From: Joe MacDonald <joe.macdon...@windriver.com>
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 <pau...@samba.org>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Signed-off-by: Joe MacDonald <joe.macdon...@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortma...@windriver.com>
---
arch/powerpc/mm/subpage-prot.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
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 @@ 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;
--
1.7.11.1
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