[PATCH v2 2/4] tools headers UAPI: add kmalloc/vmalloc related interface
From: Yunsheng Lin <hidden>
Date: 2021-07-20 02:41:53
Also in:
lkml
Subsystem:
slab allocator, the rest · Maintainers:
Vlastimil Babka, Harry Yoo, Andrew Morton, Linus Torvalds
Implement the kmalloc/vmalloc related interface based on malloc interface in user space. Signed-off-by: Yunsheng Lin <redacted> --- tools/include/linux/gfp.h | 2 ++ tools/include/linux/slab.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+) create mode 100644 tools/include/linux/slab.h
diff --git a/tools/include/linux/gfp.h b/tools/include/linux/gfp.h
index 2203075..a660ab9 100644
--- a/tools/include/linux/gfp.h
+++ b/tools/include/linux/gfp.h@@ -1,4 +1,6 @@ #ifndef _TOOLS_INCLUDE_LINUX_GFP_H #define _TOOLS_INCLUDE_LINUX_GFP_H +#define __GFP_ZERO 0x100u + #endif /* _TOOLS_INCLUDE_LINUX_GFP_H */
diff --git a/tools/include/linux/slab.h b/tools/include/linux/slab.h
new file mode 100644
index 0000000..f0b7da6
--- /dev/null
+++ b/tools/include/linux/slab.h@@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __TOOLS_LINUX_SLAB_H +#define __TOOLS_LINUX_SLAB_H + +#include <linux/gfp.h> +#include <linux/cache.h> + +static inline void *kmalloc(size_t size, gfp_t gfp) +{ + void *p; + + p = memalign(SMP_CACHE_BYTES, size); + if (!p) + return p; + + if (gfp & __GFP_ZERO) + memset(p, 0, size); + + return p; +} + +static inline void *kzalloc(size_t size, gfp_t flags) +{ + return kmalloc(size, flags | __GFP_ZERO); +} + +static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags) +{ + 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 inline void kfree(void *p) +{ + free(p); +} + +#define kvmalloc_array kmalloc_array +#define kvfree kfree +#define KMALLOC_MAX_SIZE SIZE_MAX + +#endif
--
2.7.4