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| author | Michael S. Tsirkin <mst@redhat.com> | 2015-01-06 15:37:22 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2015-01-13 16:23:32 +0300 |
| commit | 1734bffc30b80ab2447345369c84175e721ebd65 (patch) | |
| tree | 95b4503cc910f42bbe3b855473e3f1ef0238255a | |
| parent | e8b94dea3867139fe92f03b913e38ca841e390fd (diff) | |
| download | linux-1734bffc30b80ab2447345369c84175e721ebd65.tar.xz | |
blackfin: fix put_user sparse errors
virtio wants to write bitwise types to userspace using put_user.
At the moment this triggers sparse errors, since the value is passed
through an integer.
For example:
__le32 __user *p;
__le32 x;
put_user(x, p);
is safe, but currently triggers a sparse warning.
Fix that up using __force.
Note: this does not suppress any useful sparse checks since caller
assigns x to typeof(*p), which in turn forces all the necessary type
checks.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | arch/blackfin/include/asm/uaccess.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h index 2dcc9303355d..4bf968c01cf9 100644 --- a/arch/blackfin/include/asm/uaccess.h +++ b/arch/blackfin/include/asm/uaccess.h @@ -89,10 +89,10 @@ struct exception_table_entry { break; \ case 8: { \ long _xl, _xh; \ - _xl = ((long *)&_x)[0]; \ - _xh = ((long *)&_x)[1]; \ - __put_user_asm(_xl, ((long __user *)_p)+0, ); \ - __put_user_asm(_xh, ((long __user *)_p)+1, ); \ + _xl = ((__force long *)&_x)[0]; \ + _xh = ((__force long *)&_x)[1]; \ + __put_user_asm(_xl, ((__force long __user *)_p)+0, );\ + __put_user_asm(_xh, ((__force long __user *)_p)+1, );\ } break; \ default: \ _err = __put_user_bad(); \ |