[glibc/release/2.35/master] nptl: Fix ___pthread_unregister_cancel_restore asynchronous restore

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=51e2d3b53bd08a21e5a9a4ed095abd2c61f622bc

commit 51e2d3b53bd08a21e5a9a4ed095abd2c61f622bc
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Jul 13 10:37:32 2022 -0300

    nptl: Fix ___pthread_unregister_cancel_restore asynchronous restore
    
    This was due a wrong revert done on 404656009b459658.
    
    Checked on x86_64-linux-gnu and i686-linux-gnu.
    
    (cherry picked from commit f27e5e21787abc9f719879af47687221aa1027b3)

Diff:
---
 nptl/cleanup_defer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nptl/cleanup_defer.c b/nptl/cleanup_defer.c
index eb0bc77740..4e864ead32 100644
--- a/nptl/cleanup_defer.c
+++ b/nptl/cleanup_defer.c
@@ -71,7 +71,7 @@ ___pthread_unregister_cancel_restore (__pthread_unwind_buf_t *buf)
     return;
 
   int cancelhandling = atomic_load_relaxed (&self->cancelhandling);
-  if (cancelhandling & CANCELTYPE_BITMASK)
+  if ((cancelhandling & CANCELTYPE_BITMASK) == 0)
     {
       int newval;
       do