[PULL 07/50] util/async: replace __thread with QEMU TLS macros

Kevin Wolf posted 50 patches 3 years, 9 months ago
Maintainers: Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, John Snow <jsnow@redhat.com>, Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>, Eric Blake <eblake@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Fam Zheng <fam@euphon.net>, "Denis V. Lunev" <den@openvz.org>, Markus Armbruster <armbru@redhat.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, "Cédric Le Goater" <clg@kaod.org>, Daniel Henrique Barboza <danielhb413@gmail.com>, David Gibson <david@gibson.dropbear.id.au>, Greg Kurz <groug@kaod.org>, Paolo Bonzini <pbonzini@redhat.com>, Stefan Weil <sw@weilnetz.de>, Juan Quintela <quintela@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, "Daniel P. Berrangé" <berrange@redhat.com>, Eduardo Habkost <eduardo@habkost.net>
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[PULL 07/50] util/async: replace __thread with QEMU TLS macros
Posted by Kevin Wolf 3 years, 9 months ago
From: Stefan Hajnoczi <stefanha@redhat.com>

QEMU TLS macros must be used to make TLS variables safe with coroutines.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220222140150.27240-3-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 util/async.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/util/async.c b/util/async.c
index 08d25feef5..2ea1172f3e 100644
--- a/util/async.c
+++ b/util/async.c
@@ -32,6 +32,7 @@
 #include "qemu/rcu_queue.h"
 #include "block/raw-aio.h"
 #include "qemu/coroutine_int.h"
+#include "qemu/coroutine-tls.h"
 #include "trace.h"
 
 /***********************************************************/
@@ -675,12 +676,13 @@ void aio_context_release(AioContext *ctx)
     qemu_rec_mutex_unlock(&ctx->lock);
 }
 
-static __thread AioContext *my_aiocontext;
+QEMU_DEFINE_STATIC_CO_TLS(AioContext *, my_aiocontext)
 
 AioContext *qemu_get_current_aio_context(void)
 {
-    if (my_aiocontext) {
-        return my_aiocontext;
+    AioContext *ctx = get_my_aiocontext();
+    if (ctx) {
+        return ctx;
     }
     if (qemu_mutex_iothread_locked()) {
         /* Possibly in a vCPU thread.  */
@@ -691,6 +693,6 @@ AioContext *qemu_get_current_aio_context(void)
 
 void qemu_set_current_aio_context(AioContext *ctx)
 {
-    assert(!my_aiocontext);
-    my_aiocontext = ctx;
+    assert(!get_my_aiocontext());
+    set_my_aiocontext(ctx);
 }
-- 
2.35.1