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authorHridya Valsaraju <hridya@google.com>2019-09-04 14:07:03 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-09-04 14:17:35 +0300
commitca2864c6e8965c37df97f11e6f99e83e09806b1c (patch)
tree8f80195ce645022efaa0ec985ee4ad67b5134600 /drivers/android/binder.c
parent028fb5822b76bc2e095b5c145d7bd263878d9e27 (diff)
downloadlinux-ca2864c6e8965c37df97f11e6f99e83e09806b1c.tar.xz
binder: Add default binder devices through binderfs when configured
Currently, since each binderfs instance needs its own private binder devices, every time a binderfs instance is mounted, all the default binder devices need to be created via the BINDER_CTL_ADD IOCTL. This patch aims to add a solution to automatically create the default binder devices for each binderfs instance that gets mounted. To achieve this goal, when CONFIG_ANDROID_BINDERFS is set, the default binder devices specified by CONFIG_ANDROID_BINDER_DEVICES are created in each binderfs instance instead of global devices being created by the binder driver. Co-developed-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Hridya Valsaraju <hridya@google.com> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Link: https://lore.kernel.org/r/20190808222727.132744-2-hridya@google.com Link: https://lore.kernel.org/r/20190904110704.8606-2-christian.brauner@ubuntu.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/android/binder.c')
-rw-r--r--drivers/android/binder.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index dc1c83eafc22..ef2d3e582368 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -122,7 +122,7 @@ static uint32_t binder_debug_mask = BINDER_DEBUG_USER_ERROR |
BINDER_DEBUG_FAILED_TRANSACTION | BINDER_DEBUG_DEAD_TRANSACTION;
module_param_named(debug_mask, binder_debug_mask, uint, 0644);
-static char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
+char *binder_devices_param = CONFIG_ANDROID_BINDER_DEVICES;
module_param_named(devices, binder_devices_param, charp, 0444);
static DECLARE_WAIT_QUEUE_HEAD(binder_user_error_wait);
@@ -6131,7 +6131,8 @@ static int __init binder_init(void)
&transaction_log_fops);
}
- if (strcmp(binder_devices_param, "") != 0) {
+ if (!IS_ENABLED(CONFIG_ANDROID_BINDERFS) &&
+ strcmp(binder_devices_param, "") != 0) {
/*
* Copy the module_parameter string, because we don't want to
* tokenize it in-place.