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-rw-r--r--kerncompat.h75
1 files changed, 52 insertions, 23 deletions
diff --git a/kerncompat.h b/kerncompat.h
index 8b9a84c5..1493cad8 100644
--- a/kerncompat.h
+++ b/kerncompat.h
@@ -68,6 +68,14 @@
#define ULONG_MAX (~0UL)
#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)
@@ -78,26 +86,35 @@ static inline void print_trace(void)
size = backtrace(array, MAX_BACKTRACE);
backtrace_symbols_fd(array, size, 2);
}
+#endif
-static inline void assert_trace(const char *assertion, const char *filename,
- const char *func, unsigned line, int val)
+static inline void warning_trace(const char *assertion, const char *filename,
+ const char *func, unsigned line, long val)
{
- if (val)
+ if (!val)
return;
- if (assertion)
- fprintf(stderr, "%s:%d: %s: Assertion `%s` failed.\n",
- filename, line, func, assertion);
- else
- fprintf(stderr, "%s:%d: %s: Assertion failed.\n", filename,
- line, func);
+ fprintf(stderr,
+ "%s:%d: %s: Warning: assertion `%s` failed, value %ld\n",
+ filename, line, func, assertion, val);
+#ifndef BTRFS_DISABLE_BACKTRACE
print_trace();
- exit(1);
+#endif
}
-#define BUG() assert_trace(NULL, __FILE__, __func__, __LINE__, 0)
-#else
-#define BUG() assert(0)
+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))
@@ -236,11 +253,16 @@ 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);
+}
+
/*
* 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
@@ -269,19 +291,26 @@ static inline long IS_ERR(const void *ptr)
#define vfree(x) free(x)
#ifndef BTRFS_DISABLE_BACKTRACE
-#define BUG_ON(c) assert_trace(#c, __FILE__, __func__, __LINE__, !(c))
-#else
-#define BUG_ON(c) assert(!(c))
-#endif
-
-#define WARN_ON(c) BUG_ON(c)
-
-#ifndef BTRFS_DISABLE_BACKTRACE
-#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (c))
+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);
+ abort();
+ exit(1);
+}
+#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c))
#else
#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) );})