[nginx] Events: fixed -Wzero-as-null-pointer-constant warnings in kqueue.

[noreply]

details:   
https://github.com/nginx/nginx/commit/0daaba5c54aeeddffff400bfc77a08a1fd71b757
branches:  master
commit:    0daaba5c54aeeddffff400bfc77a08a1fd71b757
user:      Sergey Kandaurov <pluk...@nginx.com>
date:      Tue, 8 Jul 2025 22:45:33 +0400
description:
Events: fixed -Wzero-as-null-pointer-constant warnings in kqueue.

The kevent udata field is special in that we maintain compatibility
with NetBSD versions that predate using the "void *" type.

The fix is to cast to intermediate uintptr_t that is casted back to
"void *" where appropriate.

---
 src/event/modules/ngx_kqueue_module.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/event/modules/ngx_kqueue_module.c 
b/src/event/modules/ngx_kqueue_module.c
index 9c7244c45..fb8a6527c 100644
--- a/src/event/modules/ngx_kqueue_module.c
+++ b/src/event/modules/ngx_kqueue_module.c
@@ -191,7 +191,7 @@ ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer)
         kev.flags = EV_ADD|EV_ENABLE;
         kev.fflags = 0;
         kev.data = timer;
-        kev.udata = 0;
+        kev.udata = NGX_KQUEUE_UDATA_T (uintptr_t) 0;
 
         ts.tv_sec = 0;
         ts.tv_nsec = 0;
@@ -237,7 +237,7 @@ ngx_kqueue_notify_init(ngx_log_t *log)
     notify_kev.data = 0;
     notify_kev.flags = EV_ADD|EV_CLEAR;
     notify_kev.fflags = 0;
-    notify_kev.udata = 0;
+    notify_kev.udata = NGX_KQUEUE_UDATA_T (uintptr_t) 0;
 
     if (kevent(ngx_kqueue, &notify_kev, 1, NULL, 0, NULL) == -1) {
         ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
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