8bf98b8968
When NDEBUG is defined, the assert macro will be expanded to nothing.
Some assert calls used in perf are also including some functionality
(e.g. system calls), not only validity checks. Therefore, if NDEBUG is
defined, this functionality will be removed along with the assert. Perf
also defines BUG_ON based on assert, so it has the same problem.
Define BUG_ON so that the condition will be executed when NDEBUG is
defined. Replace the assert statements that have these side effects
with BUG_ON.
For defining BUG_ON, use "if (cond) {}" insted of "if (cond) ;" because
in the latter case build fails with "error: suggest braces around empty
body in an ‘if’ statement [-Werror=empty-body]"
Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347082551-2394-1-git-send-email-irina.tirdea@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
#ifndef PERF_LINUX_KERNEL_H_
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#define PERF_LINUX_KERNEL_H_
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#ifndef offsetof
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#ifndef container_of
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/**
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* container_of - cast a member of a structure out to the containing structure
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* @ptr: the pointer to the member.
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* @type: the type of the container struct this is embedded in.
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* @member: the name of the member within the struct.
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*
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*/
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *)0)->member) * __mptr = (ptr); \
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(type *)((char *)__mptr - offsetof(type, member)); })
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#endif
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#define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
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#ifndef max
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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#endif
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#ifndef min
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#endif
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#ifndef BUG_ON
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#ifdef NDEBUG
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#define BUG_ON(cond) do { if (cond) {} } while (0)
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#else
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#define BUG_ON(cond) assert(!(cond))
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#endif
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#endif
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/*
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* Both need more care to handle endianness
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* (Don't use bitmap_copy_le() for now)
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*/
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#define cpu_to_le64(x) (x)
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#define cpu_to_le32(x) (x)
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static inline int
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vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
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{
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int i;
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ssize_t ssize = size;
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i = vsnprintf(buf, size, fmt, args);
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return (i >= ssize) ? (ssize - 1) : i;
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}
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static inline int scnprintf(char * buf, size_t size, const char * fmt, ...)
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{
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va_list args;
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ssize_t ssize = size;
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int i;
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va_start(args, fmt);
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i = vsnprintf(buf, size, fmt, args);
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va_end(args);
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return (i >= ssize) ? (ssize - 1) : i;
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}
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static inline unsigned long
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simple_strtoul(const char *nptr, char **endptr, int base)
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{
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return strtoul(nptr, endptr, base);
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}
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int eprintf(int level,
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const char *fmt, ...) __attribute__((format(printf, 2, 3)));
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#ifndef pr_fmt
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#define pr_fmt(fmt) fmt
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#endif
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#define pr_err(fmt, ...) \
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eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_warning(fmt, ...) \
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eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_info(fmt, ...) \
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eprintf(0, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug(fmt, ...) \
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eprintf(1, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debugN(n, fmt, ...) \
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eprintf(n, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug2(fmt, ...) pr_debugN(2, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug3(fmt, ...) pr_debugN(3, pr_fmt(fmt), ##__VA_ARGS__)
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#define pr_debug4(fmt, ...) pr_debugN(4, pr_fmt(fmt), ##__VA_ARGS__)
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/*
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* This looks more complex than it should be. But we need to
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* get the type for the ~ right in round_down (it needs to be
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* as wide as the result!), and we want to evaluate the macro
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* arguments just once each.
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*/
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#define __round_mask(x, y) ((__typeof__(x))((y)-1))
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#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
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#define round_down(x, y) ((x) & ~__round_mask(x, y))
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#endif
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