[PATCH AUTOSEL 4.9 53/98] ptr_ring: fix up after recent ptr_ring changes

Sasha Levin
2018-10-25T14:13:38Z

From: "Michael S. Tsirkin" <mst@redhat.com>

[ Upstream commit 5790eabc6e7c3ce2d6ca2e3bbf4de467ce2b64b3 ]

Add more stubs to make it build.

Fixes: 81fbfe8a ("ptr_ring: use kmalloc_array()")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/virtio/ringtest/ptr_ring.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/tools/virtio/ringtest/ptr_ring.c b/tools/virtio/ringtest/ptr_ring.c
index 635b07b4fdd3..b4a2e6af515f 100644
--- a/tools/virtio/ringtest/ptr_ring.c
+++ b/tools/virtio/ringtest/ptr_ring.c
@@ -15,24 +15,41 @@
#define unlikely(x) (__builtin_expect(!!(x), 0))
#define likely(x) (__builtin_expect(!!(x), 1))
#define ALIGN(x, a) (((x) + (a) - 1) / (a) * (a))
+#define SIZE_MAX (~(size_t)0)
+
typedef pthread_spinlock_t spinlock_t;

typedef int gfp_t;
-static void *kmalloc(unsigned size, gfp_t gfp)
-{
- return memalign(64, size);
-}
+#define __GFP_ZERO 0x1

-static void *kzalloc(unsigned size, gfp_t gfp)
+static void *kmalloc(unsigned size, gfp_t gfp)
{
void *p = memalign(64, size);
if (!p)
return p;
- memset(p, 0, size);

+ if (gfp & __GFP_ZERO)
+ memset(p, 0, size);
return p;
}

+static inline void *kzalloc(unsigned size, gfp_t flags)
+{
+ return kmalloc(size, flags | __GFP_ZERO);
+}
+
+static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags)
+{
+ if (size != 0 && n > SIZE_MAX / size)
+ return NULL;
+ return kmalloc(n * size, flags);
+}
+
+static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
+{
+ return kmalloc_array(n, size, flags | __GFP_ZERO);
+}
+
static void kfree(void *p)
{
if (p)
--
2.17.1