cregit-Linux how code gets into the kernel

Release 4.18 tools/testing/scatterlist/linux/mm.h

#ifndef _LINUX_MM_H

#define _LINUX_MM_H

#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>


typedef unsigned long dma_addr_t;


#define unlikely


#define BUG_ON(x) assert(!(x))


#define WARN_ON(condition) ({                                           \
        int __ret_warn_on = !!(condition);                              \
        unlikely(__ret_warn_on);                                        \
})


#define WARN_ON_ONCE(condition) ({                              \
        int __ret_warn_on = !!(condition);                      \
        if (unlikely(__ret_warn_on))                            \
                assert(0);                                      \
        unlikely(__ret_warn_on);                                \
})


#define PAGE_SIZE	(4096)

#define PAGE_SHIFT	(12)

#define PAGE_MASK	(~(PAGE_SIZE-1))


#define __ALIGN_KERNEL(x, a)		__ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)

#define __ALIGN_KERNEL_MASK(x, mask)	(((x) + (mask)) & ~(mask))

#define ALIGN(x, a)			__ALIGN_KERNEL((x), (a))


#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)


#define offset_in_page(p)	((unsigned long)(p) & ~PAGE_MASK)


#define virt_to_page(x)	((void *)x)

#define page_address(x)	((void *)x)


static inline unsigned long page_to_phys(struct page *page) { assert(0); return 0; }

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#define page_to_pfn(page) ((unsigned long)(page) / PAGE_SIZE) #define pfn_to_page(pfn) (void *)((pfn) * PAGE_SIZE) #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) #define __min(t1, t2, min1, min2, x, y) ({ \ t1 min1 = (x); \ t2 min2 = (y); \ (void) (&min1 == &min2); \ min1 < min2 ? min1 : min2; }) #define ___PASTE(a,b) a##b #define __PASTE(a,b) ___PASTE(a,b) #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__) #define min(x, y) \ __min(typeof(x), typeof(y), \ __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \ x, y) #define min_t(type, x, y) \ __min(type, type, \ __UNIQUE_ID(min1_), __UNIQUE_ID(min2_), \ x, y) #define preemptible() (1)
static inline void *kmap(struct page *page) { assert(0); return NULL; }

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static inline void *kmap_atomic(struct page *page) { assert(0); return NULL; }

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static inline void kunmap(void *addr) { assert(0); }

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static inline void kunmap_atomic(void *addr) { assert(0); }

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static inline unsigned long __get_free_page(unsigned int flags) { return (unsigned long)malloc(PAGE_SIZE); }

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

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static inline void *kmalloc(unsigned int size, unsigned int flags) { return malloc(size); }

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#define kfree(x) free(x) #define kmemleak_alloc(a, b, c, d) #define kmemleak_free(a) #define PageSlab(p) (0) #define flush_kernel_dcache_page(p) #endif

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