diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-08 10:11:33 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-03-08 10:11:33 -0300 |
| commit | 009ef05f98129aa91c62c3baab859ba593a15bb2 (patch) | |
| tree | f3414f08d636a597545b1e4f443b373b9d6d8f4b /kernel/livepatch/core.c | |
| parent | 2777b81b379df772defd654bc4d3fa82dca17a4b (diff) | |
| parent | 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32 (diff) | |
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up the fixes sent for v5.12 and continue development based on
v5.12-rc2, i.e. without the swap on file bug.
This also gets a slightly newer and better tools/perf/arch/arm/util/cs-etm.c
patch version, using the BIT() macro, that had already been slated to
v5.13 but ended up going to v5.12-rc1 on an older version.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/livepatch/core.c')
| -rw-r--r-- | kernel/livepatch/core.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c index f76fdb9255323..335d988bd8111 100644 --- a/kernel/livepatch/core.c +++ b/kernel/livepatch/core.c @@ -19,6 +19,7 @@ #include <linux/moduleloader.h> #include <linux/completion.h> #include <linux/memory.h> +#include <linux/rcupdate.h> #include <asm/cacheflush.h> #include "core.h" #include "patch.h" @@ -57,7 +58,7 @@ static void klp_find_object_module(struct klp_object *obj) if (!klp_is_module(obj)) return; - mutex_lock(&module_mutex); + rcu_read_lock_sched(); /* * We do not want to block removal of patched modules and therefore * we do not take a reference here. The patches are removed by @@ -74,7 +75,7 @@ static void klp_find_object_module(struct klp_object *obj) if (mod && mod->klp_alive) obj->mod = mod; - mutex_unlock(&module_mutex); + rcu_read_unlock_sched(); } static bool klp_initialized(void) @@ -163,12 +164,10 @@ static int klp_find_object_symbol(const char *objname, const char *name, .pos = sympos, }; - mutex_lock(&module_mutex); if (objname) module_kallsyms_on_each_symbol(klp_find_callback, &args); else kallsyms_on_each_symbol(klp_find_callback, &args); - mutex_unlock(&module_mutex); /* * Ensure an address was found. If sympos is 0, ensure symbol is unique; |