[PATCH 08/12] core: Add cus__remove(), counterpart of cus__add()

[Arnaldo Carvalho de Melo <acme@kernel.org>]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

We'll switch to adding the 'struct cu' instance to the 'struct cus' list
early, under the lock, to keep the order from the original DWARF file
and then LSK_KEEPIT will just leave it there while LSK_DELETE will first
remove it from the cus list, under cus lock, to then call cu__delete().

Cc: Alan Maguire <alan.maguire@oracle.com>
Cc: Kui-Feng Lee <kuifeng@fb.com>
Cc: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 dwarves.c | 13 +++++++++++++
 dwarves.h |  4 ++++
 2 files changed, 17 insertions(+)

diff --git a/dwarves.c b/dwarves.c
index 654a8085e9252a21..3cd300db97973ce4 100644
--- a/dwarves.c
+++ b/dwarves.c
@@ -479,6 +479,19 @@ uint32_t cus__nr_entries(const struct cus *cus)
 	return cus->nr_entries;
 }
 
+void __cus__remove(struct cus *cus, struct cu *cu)
+{
+	cus->nr_entries--;
+	list_del_init(&cu->node);
+}
+
+void cus__remove(struct cus *cus, struct cu *cu)
+{
+	cus__lock(cus);
+	__cus__remove(cus, cu);
+	cus__unlock(cus);
+}
+
 void __cus__add(struct cus *cus, struct cu *cu)
 {
 	cus->nr_entries++;
diff --git a/dwarves.h b/dwarves.h
index 42b00bc1341e66cb..9dc9cb4b074b5d33 100644
--- a/dwarves.h
+++ b/dwarves.h
@@ -173,6 +173,10 @@ int cus__load_dir(struct cus *cus, struct conf_load *conf,
 		  const int recursive);
 void __cus__add(struct cus *cus, struct cu *cu);
 void cus__add(struct cus *cus, struct cu *cu);
+
+void __cus__remove(struct cus *cus, struct cu *cu);
+void cus__remove(struct cus *cus, struct cu *cu);
+
 void cus__print_error_msg(const char *progname, const struct cus *cus,
 			  const char *filename, const int err);
 struct cu *cus__find_pair(struct cus *cus, const char *name);
-- 
2.44.0