Fix systemd-time-wait-sync getting stuck with upstream patches (#897)

buildroot-external/patches/systemd/0002-time-wait-sync-log-inotify-errors.patch

@@ -0,0 +1,23 @@
+From 4a4298ef78e943d36f3b8d8e78bfa21b1506961e Mon Sep 17 00:00:00 2001
+From: Aman Gupta Karmani <aman@tmm1.net>
+Date: Mon, 12 Oct 2020 13:39:26 -0700
+Subject: [PATCH] time-wait-sync: log errors trying to watch
+ /run/systemd/timesync
+
+---
+ src/time-wait-sync/time-wait-sync.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/time-wait-sync/time-wait-sync.c b/src/time-wait-sync/time-wait-sync.c
+index 96072445f6e..c8ec4850426 100644
+--- a/src/time-wait-sync/time-wait-sync.c
++++ b/src/time-wait-sync/time-wait-sync.c
+@@ -50,7 +50,7 @@ static void clock_state_release(ClockState *sp) {
+ static int clock_state_update(ClockState *sp, sd_event *event);
+ 
+ static int update_notify_run_systemd_timesync(ClockState *sp) {
+-        sp->run_systemd_timesync_wd = inotify_add_watch(sp->inotify_fd, "/run/systemd/timesync", IN_CREATE|IN_DELETE_SELF);
++        sp->run_systemd_timesync_wd = inotify_add_watch_and_warn(sp->inotify_fd, "/run/systemd/timesync", IN_CREATE|IN_DELETE_SELF);
+         return sp->run_systemd_timesync_wd;
+ }
+ 

buildroot-external/patches/systemd/0003-fix-inotify-watches.patch

@@ -0,0 +1,54 @@
+From f6f4f5fe5395a57f10dd446c7266c53f0673eaac Mon Sep 17 00:00:00 2001
+From: Balaji Punnuru <balaji_punnuru@cable.comcast.com>
+Date: Thu, 9 Apr 2020 12:21:49 -0400
+Subject: [PATCH] util: return the correct correct wd from inotify helpers
+
+We need to propagate the acquired watch descriptors because our callers
+are counting on them.
+
+[Lennart: this is split out of #15381 and simplified]
+---
+ src/basic/fs-util.c | 14 ++++++++------
+ 1 file changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/src/basic/fs-util.c b/src/basic/fs-util.c
+index 558cafbcaf5..ef3b5a51842 100644
+--- a/src/basic/fs-util.c
++++ b/src/basic/fs-util.c
+@@ -692,28 +692,30 @@ int unlink_or_warn(const char *filename) {
+ 
+ int inotify_add_watch_fd(int fd, int what, uint32_t mask) {
+         char path[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int) + 1];
+-        int r;
++        int wd;
+ 
+         /* This is like inotify_add_watch(), except that the file to watch is not referenced by a path, but by an fd */
+         xsprintf(path, "/proc/self/fd/%i", what);
+ 
+-        r = inotify_add_watch(fd, path, mask);
+-        if (r < 0)
++        wd = inotify_add_watch(fd, path, mask);
++        if (wd < 0)
+                 return -errno;
+ 
+-        return r;
++        return wd;
+ }
+ 
+ int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask) {
++        int wd;
+ 
+-        if (inotify_add_watch(fd, pathname, mask) < 0) {
++        wd = inotify_add_watch(fd, pathname, mask);
++        if (wd < 0) {
+                 if (errno == ENOSPC)
+                         return log_error_errno(errno, "Failed to add a watch for %s: inotify watch limit reached", pathname);
+ 
+                 return log_error_errno(errno, "Failed to add a watch for %s: %m", pathname);
+         }
+ 
+-        return 0;
++        return wd;
+ }
+ 
+ static bool unsafe_transition(const struct stat *a, const struct stat *b) {