kernel-fxtec-pro1x/tools/perf/util/intlist.c
Irina Tirdea 1d037ca164 perf tools: Use __maybe_used for unused variables
perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-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/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05 in builtin-sched.c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-09-11 12:19:15 -03:00

101 lines
2.1 KiB
C

/*
* Based on intlist.c by:
* (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Licensed under the GPLv2.
*/
#include <errno.h>
#include <stdlib.h>
#include <linux/compiler.h>
#include "intlist.h"
static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
const void *entry)
{
int i = (int)((long)entry);
struct rb_node *rc = NULL;
struct int_node *node = malloc(sizeof(*node));
if (node != NULL) {
node->i = i;
rc = &node->rb_node;
}
return rc;
}
static void int_node__delete(struct int_node *ilist)
{
free(ilist);
}
static void intlist__node_delete(struct rblist *rblist __maybe_unused,
struct rb_node *rb_node)
{
struct int_node *node = container_of(rb_node, struct int_node, rb_node);
int_node__delete(node);
}
static int intlist__node_cmp(struct rb_node *rb_node, const void *entry)
{
int i = (int)((long)entry);
struct int_node *node = container_of(rb_node, struct int_node, rb_node);
return node->i - i;
}
int intlist__add(struct intlist *ilist, int i)
{
return rblist__add_node(&ilist->rblist, (void *)((long)i));
}
void intlist__remove(struct intlist *ilist, struct int_node *node)
{
rblist__remove_node(&ilist->rblist, &node->rb_node);
}
struct int_node *intlist__find(struct intlist *ilist, int i)
{
struct int_node *node = NULL;
struct rb_node *rb_node = rblist__find(&ilist->rblist, (void *)((long)i));
if (rb_node)
node = container_of(rb_node, struct int_node, rb_node);
return node;
}
struct intlist *intlist__new(void)
{
struct intlist *ilist = malloc(sizeof(*ilist));
if (ilist != NULL) {
rblist__init(&ilist->rblist);
ilist->rblist.node_cmp = intlist__node_cmp;
ilist->rblist.node_new = intlist__node_new;
ilist->rblist.node_delete = intlist__node_delete;
}
return ilist;
}
void intlist__delete(struct intlist *ilist)
{
if (ilist != NULL)
rblist__delete(&ilist->rblist);
}
struct int_node *intlist__entry(const struct intlist *ilist, unsigned int idx)
{
struct int_node *node = NULL;
struct rb_node *rb_node;
rb_node = rblist__entry(&ilist->rblist, idx);
if (rb_node)
node = container_of(rb_node, struct int_node, rb_node);
return node;
}