X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=kerncompat.h;h=fa96715fb70cef75e8c95603f5034a39d57a268e;hb=a7e56ef21b666b26e9668094d4c171788a914840;hp=e4c8ce0c3a768fc4551ebf0d91a2dad4e1b40984;hpb=95d3f20b51e9b2ee21822313ad4f31279396407b;p=platform%2Fupstream%2Fbtrfs-progs.git diff --git a/kerncompat.h b/kerncompat.h index e4c8ce0..fa96715 100644 --- a/kerncompat.h +++ b/kerncompat.h @@ -16,8 +16,9 @@ * Boston, MA 021110-1307, USA. */ -#ifndef __KERNCOMPAT -#define __KERNCOMPAT +#ifndef __KERNCOMPAT_H__ +#define __KERNCOMPAT_H__ + #include #include #include @@ -25,6 +26,25 @@ #include #include #include +#include +#include +#include + +#include + +#ifndef __GLIBC__ +#ifndef BTRFS_DISABLE_BACKTRACE +#define BTRFS_DISABLE_BACKTRACE +#endif +#define __always_inline __inline __attribute__ ((__always_inline__)) +#endif + +#ifndef BTRFS_DISABLE_BACKTRACE +#include +#endif + +#define ptr_to_u64(x) ((u64)(uintptr_t)x) +#define u64_to_ptr(x) ((void *)(uintptr_t)x) #ifndef READ #define READ 0 @@ -35,15 +55,67 @@ #define gfp_t int #define get_cpu_var(p) (p) #define __get_cpu_var(p) (p) -#define BITS_PER_LONG (sizeof(long) * 8) +#define BITS_PER_BYTE 8 +#define BITS_PER_LONG (__SIZEOF_LONG__ * BITS_PER_BYTE) #define __GFP_BITS_SHIFT 20 #define __GFP_BITS_MASK ((int)((1 << __GFP_BITS_SHIFT) - 1)) #define GFP_KERNEL 0 #define GFP_NOFS 0 #define __read_mostly #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +#ifndef ULONG_MAX #define ULONG_MAX (~0UL) -#define BUG() abort() +#endif + +#define __token_glue(a,b,c) ___token_glue(a,b,c) +#define ___token_glue(a,b,c) a ## b ## c +#ifdef DEBUG_BUILD_CHECKS +#define BUILD_ASSERT(x) extern int __token_glue(compile_time_assert_,__LINE__,__COUNTER__)[1-2*!(x)] __attribute__((unused)) +#else +#define BUILD_ASSERT(x) +#endif + +#ifndef BTRFS_DISABLE_BACKTRACE +#define MAX_BACKTRACE 16 +static inline void print_trace(void) +{ + void *array[MAX_BACKTRACE]; + int size; + + size = backtrace(array, MAX_BACKTRACE); + backtrace_symbols_fd(array, size, 2); +} +#endif + +static inline void warning_trace(const char *assertion, const char *filename, + const char *func, unsigned line, long val) +{ + if (!val) + return; + fprintf(stderr, + "%s:%d: %s: Warning: assertion `%s` failed, value %ld\n", + filename, line, func, assertion, val); +#ifndef BTRFS_DISABLE_BACKTRACE + print_trace(); +#endif +} + +static inline void bugon_trace(const char *assertion, const char *filename, + const char *func, unsigned line, long val) +{ + if (!val) + return; + fprintf(stderr, + "%s:%d: %s: BUG_ON `%s` triggered, value %ld\n", + filename, line, func, assertion, val); +#ifndef BTRFS_DISABLE_BACKTRACE + print_trace(); +#endif + abort(); + exit(1); +} + #ifdef __CHECKER__ #define __force __attribute__((force)) #define __bitwise__ __attribute__((bitwise)) @@ -53,17 +125,33 @@ #endif #ifndef __CHECKER__ +/* + * Since we're using primitive definitions from kernel-space, we need to + * define __KERNEL__ so that system header files know which definitions + * to use. + */ +#define __KERNEL__ #include typedef __u32 u32; typedef __u64 u64; typedef __u16 u16; typedef __u8 u8; +typedef __s64 s64; +typedef __s32 s32; + +/* + * Continuing to define __KERNEL__ breaks others parts of the code, so + * we can just undefine it now that we have the correct headers... + */ +#undef __KERNEL__ #else typedef unsigned int u32; typedef unsigned int __u32; typedef unsigned long long u64; typedef unsigned char u8; typedef unsigned short u16; +typedef long long s64; +typedef int s32; #endif @@ -110,6 +198,10 @@ static inline int mutex_is_locked(struct mutex *m) #define BITOP_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) #define BITOP_WORD(nr) ((nr) / BITS_PER_LONG) +#ifndef __attribute_const__ +#define __attribute_const__ __attribute__((__const__)) +#endif + /** * __set_bit - Set a bit in memory * @nr: the bit to set @@ -161,30 +253,25 @@ static inline long PTR_ERR(const void *ptr) return (long) ptr; } -static inline long IS_ERR(const void *ptr) +static inline int IS_ERR(const void *ptr) { return IS_ERR_VALUE((unsigned long)ptr); } +static inline int IS_ERR_OR_NULL(const void *ptr) +{ + return !ptr || IS_ERR(ptr); +} + /* - * max/min macro + * This looks more complex than it should be. But we need to + * get the type for the ~ right in round_down (it needs to be + * as wide as the result!), and we want to evaluate the macro + * arguments just once each. */ -#define min(x,y) ({ \ - typeof(x) _x = (x); \ - typeof(y) _y = (y); \ - (void) (&_x == &_y); \ - _x < _y ? _x : _y; }) - -#define max(x,y) ({ \ - typeof(x) _x = (x); \ - typeof(y) _y = (y); \ - (void) (&_x == &_y); \ - _x > _y ? _x : _y; }) - -#define min_t(type,x,y) \ - ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; }) -#define max_t(type,x,y) \ - ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; }) +#define __round_mask(x, y) ((__typeof__(x))((y)-1)) +#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) +#define round_down(x, y) ((x) & ~__round_mask(x, y)) /* * printk @@ -200,26 +287,51 @@ static inline long IS_ERR(const void *ptr) #define kzalloc(x, y) calloc(1, x) #define kstrdup(x, y) strdup(x) #define kfree(x) free(x) +#define vmalloc(x) malloc(x) +#define vfree(x) free(x) -#define BUG_ON(c) assert(!(c)) -#define WARN_ON(c) assert(!(c)) - -#undef offsetof -#ifdef __compiler_offsetof -#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER) +#ifndef BTRFS_DISABLE_BACKTRACE +static inline void assert_trace(const char *assertion, const char *filename, + const char *func, unsigned line, long val) +{ + if (val) + return; + fprintf(stderr, + "%s:%d: %s: Assertion `%s` failed, value %ld\n", + filename, line, func, assertion, val); +#ifndef BTRFS_DISABLE_BACKTRACE + print_trace(); +#endif + abort(); + exit(1); +} +#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) #else -#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) +#define ASSERT(c) assert(c) #endif +#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) +#define BUG() BUG_ON(1) +#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) + #define container_of(ptr, type, member) ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );}) +#ifndef __bitwise #ifdef __CHECKER__ -#define __CHECK_ENDIAN__ #define __bitwise __bitwise__ #else #define __bitwise -#endif +#endif /* __CHECKER__ */ +#endif /* __bitwise */ + +/* Alignment check */ +#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) + +static inline int is_power_of_2(unsigned long n) +{ + return (n != 0 && ((n & (n - 1)) == 0)); +} typedef u16 __bitwise __le16; typedef u16 __bitwise __be16; @@ -251,8 +363,35 @@ typedef u64 __bitwise __be64; #define cpu_to_le16(x) ((__force __le16)(u16)(x)) #define le16_to_cpu(x) ((__force u16)(__le16)(x)) #endif + +struct __una_u16 { __le16 x; } __attribute__((__packed__)); +struct __una_u32 { __le32 x; } __attribute__((__packed__)); +struct __una_u64 { __le64 x; } __attribute__((__packed__)); + +#define get_unaligned_le8(p) (*((u8 *)(p))) +#define get_unaligned_8(p) (*((u8 *)(p))) +#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val)) +#define put_unaligned_8(val,p) ((*((u8 *)(p))) = (val)) +#define get_unaligned_le16(p) le16_to_cpu(((const struct __una_u16 *)(p))->x) +#define get_unaligned_16(p) (((const struct __una_u16 *)(p))->x) +#define put_unaligned_le16(val,p) (((struct __una_u16 *)(p))->x = cpu_to_le16(val)) +#define put_unaligned_16(val,p) (((struct __una_u16 *)(p))->x = (val)) +#define get_unaligned_le32(p) le32_to_cpu(((const struct __una_u32 *)(p))->x) +#define get_unaligned_32(p) (((const struct __una_u32 *)(p))->x) +#define put_unaligned_le32(val,p) (((struct __una_u32 *)(p))->x = cpu_to_le32(val)) +#define put_unaligned_32(val,p) (((struct __una_u32 *)(p))->x = (val)) +#define get_unaligned_le64(p) le64_to_cpu(((const struct __una_u64 *)(p))->x) +#define get_unaligned_64(p) (((const struct __una_u64 *)(p))->x) +#define put_unaligned_le64(val,p) (((struct __una_u64 *)(p))->x = cpu_to_le64(val)) +#define put_unaligned_64(val,p) (((struct __una_u64 *)(p))->x = (val)) + +#ifndef true +#define true 1 +#define false 0 #endif #ifndef noinline #define noinline #endif + +#endif