[PATCH 6/7] rust_binder: Implement BINDER_DEBUG_FAILED_TRANSACTION logging for death notification allocation failures

[Jahnavi MN via B4 Relay <devnull+jahnavimn.google.com@kernel.org>]

From: Jahnavi MN <jahnavimn@google.com>

This adds dynamic debug logs for:
- Memory allocation failures when registering process death
  notifications due to out-of-memory (OOM) conditions.

Signed-off-by: Jahnavi MN <jahnavimn@google.com>
---
 drivers/android/binder/process.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/android/binder/process.rs b/drivers/android/binder/process.rs
index db929cc35585..4c200d3d5604 100644
--- a/drivers/android/binder/process.rs
+++ b/drivers/android/binder/process.rs
@@ -1238,6 +1238,11 @@ pub(crate) fn request_death(
         // Queue BR_ERROR if we can't allocate memory for the death notification.
         let death = UniqueArc::new_uninit(GFP_KERNEL).inspect_err(|_| {
             thread.push_return_work(BR_ERROR);
+            binder_debug!(
+                crate::debug::BINDER_DEBUG_FAILED_TRANSACTION,
+                "process {} BC_REQUEST_DEATH_NOTIFICATION failed",
+                self.pid_in_current_ns()
+            );
         })?;
         let mut refs = self.node_refs.lock();
         let Some(info) = refs.by_handle.get_mut(&handle) else {

-- 
2.55.0.rc0.799.gd6f94ed593-goog