Fixes sparse issues reported by the kbuild test robot running
on https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
char-misc-testing: bde4a19fc04f5 ("binder: use userspace pointer as base
of buffer space")
Error output (drivers/android/binder_alloc_selftest.c):
sparse: warning: incorrect type in assignment (different address spaces)
sparse: expected void *page_addr
sparse: got void [noderef] <asn:1> *user_data
sparse: error: subtraction of different types can't work
Fixed by adding necessary "__user" tags.
Reported-by: kbuild test robot <l...@intel.com>
Signed-off-by: Todd Kjos <tk...@google.com>
---
drivers/android/binder_alloc_selftest.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/android/binder_alloc_selftest.c
b/drivers/android/binder_alloc_selftest.c
index f0f4d7d026351..b72708918b06b 100644
--- a/drivers/android/binder_alloc_selftest.c
+++ b/drivers/android/binder_alloc_selftest.c
@@ -102,10 +102,11 @@ static bool check_buffer_pages_allocated(struct
binder_alloc *alloc,
struct binder_buffer *buffer,
size_t size)
{
- void *page_addr, *end;
+ void __user *page_addr;
+ void __user *end;
int page_index;
- end = (void *)PAGE_ALIGN((uintptr_t)buffer->user_data + size);
+ end = (void __user *)PAGE_ALIGN((uintptr_t)buffer->user_data + size);
page_addr = buffer->user_data;
for (; page_addr < end; page_addr += PAGE_SIZE) {
page_index = (page_addr - alloc->buffer) / PAGE_SIZE;
--
2.20.1.791.gb4d0f1c61a-goog
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