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tools/virtio: fix build for kmalloc_obj API and missing stubs

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Add stubs for kmalloc_obj() and kmalloc_objs() to the tools/virtio
test harness, matching the new kernel allocator API. Also add the
DMA_ATTR_CPU_CACHE_CLEAN definition and include kernel.h from err.h
for the unlikely() macro.

Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <a0bd4b5bed56c49626c92a754d7aceab3325de25.1780520728.git.mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin
2026-06-03 16:33:28 -04:00
parent 32fe1de5c1
commit 3afcb36309
3 changed files with 9 additions and 0 deletions
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2
tools/virtio/linux/dma-mapping.h
View File

@@ -60,4 +60,6 @@ enum dma_data_direction {
*/
#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
#define DMA_ATTR_CPU_CACHE_CLEAN (1UL << 11)
#endif

1
tools/virtio/linux/err.h
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@@ -1,6 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ERR_H
#define ERR_H
#include <linux/kernel.h>
#define MAX_ERRNO 4095
#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)

6
tools/virtio/linux/kernel.h
View File

@@ -65,6 +65,12 @@ static inline void *kmalloc_array(unsigned n, size_t s, gfp_t gfp)
return kmalloc(n * s, gfp);
}
#define kmalloc_obj(VAR_OR_TYPE, ...) \
((typeof(VAR_OR_TYPE) *)kmalloc(sizeof(typeof(VAR_OR_TYPE)), 0))
#define kmalloc_objs(VAR_OR_TYPE, COUNT, ...) \
((typeof(VAR_OR_TYPE) *)kmalloc(sizeof(typeof(VAR_OR_TYPE)) * (COUNT), 0))
static inline void *kzalloc(size_t s, gfp_t gfp)
{
void *p = kmalloc(s, gfp);