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Subject[tip: perf/urgent] perf maps: Move kmap::kmaps setup to maps__insert()
The following commit has been merged into the perf/urgent branch of tip:

Commit-ID: 484214f49bd0948d716832a94e4737ca4dd02c16
Gitweb: https://git.kernel.org/tip/484214f49bd0948d716832a94e4737ca4dd02c16
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Mon, 10 Feb 2020 15:32:18 +01:00
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitterDate: Tue, 11 Feb 2020 16:41:49 -03:00

perf maps: Move kmap::kmaps setup to maps__insert()

So the kmaps pointer setup is centralized and we do not need to update
it in all those places (2 current places and few more missing) after
calling maps__insert().

Reported-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Tested-by: Kim Phillips <kim.phillips@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200210143218.24948-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/machine.c | 13 +------------
tools/perf/util/map.c | 10 ++++++++++
2 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 0ad0265..fb5c2cd 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -981,7 +981,6 @@ int machine__create_extra_kernel_map(struct machine *machine,

kmap = map__kmap(map);

- kmap->kmaps = &machine->kmaps;
strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);

maps__insert(&machine->kmaps, map);
@@ -1091,9 +1090,6 @@ int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unu
static int
__machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
{
- struct kmap *kmap;
- struct map *map;
-
/* In case of renewal the kernel map, destroy previous one */
machine__destroy_kernel_maps(machine);

@@ -1102,14 +1098,7 @@ __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
return -1;

machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
- map = machine__kernel_map(machine);
- kmap = map__kmap(map);
- if (!kmap)
- return -1;
-
- kmap->kmaps = &machine->kmaps;
- maps__insert(&machine->kmaps, map);
-
+ maps__insert(&machine->kmaps, machine->vmlinux_map);
return 0;
}

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index cea05fc..a08ca27 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -543,6 +543,16 @@ void maps__insert(struct maps *maps, struct map *map)
__maps__insert(maps, map);
++maps->nr_maps;

+ if (map->dso && map->dso->kernel) {
+ struct kmap *kmap = map__kmap(map);
+
+ if (kmap)
+ kmap->kmaps = maps;
+ else
+ pr_err("Internal error: kernel dso with non kernel map\n");
+ }
+
+
/*
* If we already performed some search by name, then we need to add the just
* inserted map and resort.
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