tools/virtio/linux/kernel.h

Source file repositories/reference/linux-study-clean/tools/virtio/linux/kernel.h

File Facts

System
Linux kernel
Corpus path
tools/virtio/linux/kernel.h
Extension
.h
Size
3833 bytes
Lines
167
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct page {
	unsigned long long dummy;
};

/* Physical == Virtual */
#define virt_to_phys(p) ((unsigned long)p)
#define phys_to_virt(a) ((void *)(unsigned long)(a))
/* Page address: Virtual / 4K */
#define page_to_phys(p) ((dma_addr_t)(unsigned long)(p))
#define virt_to_page(p) ((struct page *)((unsigned long)p & PAGE_MASK))

#define offset_in_page(p) (((unsigned long)p) % PAGE_SIZE)

#define __printf(a,b) __attribute__((format(printf,a,b)))

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

extern void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
static inline void *kmalloc(size_t s, gfp_t gfp)
{
	if (__kmalloc_fake)
		return __kmalloc_fake;
	return malloc(s);
}
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);

	memset(p, 0, s);
	return p;
}

static inline void *alloc_pages_exact(size_t s, gfp_t gfp)
{
	return kmalloc(s, gfp);
}

static inline void kfree(void *p)
{
	if (p >= __kfree_ignore_start && p < __kfree_ignore_end)
		return;
	free(p);
}

static inline void free_pages_exact(void *p, size_t s)
{
	kfree(p);
}

static inline void *krealloc(void *p, size_t s, gfp_t gfp)
{
	return realloc(p, s);
}


static inline unsigned long __get_free_page(gfp_t gfp)
{
	void *p;

	posix_memalign(&p, PAGE_SIZE, PAGE_SIZE);
	return (unsigned long)p;
}

static inline void free_page(unsigned long addr)
{
	free((void *)addr);
}

# ifndef likely
#  define likely(x)	(__builtin_expect(!!(x), 1))
# endif
# ifndef unlikely
#  define unlikely(x)	(__builtin_expect(!!(x), 0))
# endif

static inline void *krealloc_array(void *p, size_t new_n, size_t new_size, gfp_t gfp)
{
	size_t bytes;

Annotation

Implementation Notes