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bh=wxtpjNz0rs5YhuqAcqSNWS4ifnvH/yoYlRix1ka4hn8=; b=Zw5ma+M4GYDtRP3h/HOcB/LtVUCGceszdA5MeWWY8YzJPgDUHas1I8lpYzc/cZDmamTp4V oHXq9QsgMcRahBUPL9/V1w2FEbDT6lQBTEeGSf1TV2X/3eE3oDbfg9t7LZJYRaVChv+Al/ cuLKJHIYnOwR4IzMvAihlP1YViFq2Xo= X-MC-Unique: iiMaZWqgN4K0fPTjfYCdpA-1 From: Eric Blake To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, armbru@redhat.com, philmd@linaro.org, Vladimir Sementsov-Ogievskiy Subject: [PATCH] qemu-nbd: changes towards enabling -Wshadow=local Date: Fri, 22 Sep 2023 15:50:20 -0500 Message-ID: <20230922205019.2755352-2-eblake@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1695416167309100001 Content-Type: text/plain; charset="utf-8" Address all compiler complaints from -Wshadow in qemu-nbd. Several instances of 'int ret' became shadows when commit 4fbec260 added 'ret' at a higher scope in main. More interesting was the 'void *ret' capturing the result of a pthread; where we were conceptually doing '(void*)(intptr_t)EXIT_FAILURE !=3D NULL' which just feels wrong (even though it happens to compile correctly), so it was worth a better cleanup. Signed-off-by: Eric Blake Reviewed-by: Daniel P. Berrang=C3=A9 --- I'm happy to let Markus collect this with the growing pile on shadow-next, instead of going through my NBD tree. qemu-nbd.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/qemu-nbd.c b/qemu-nbd.c index 30eeb6f3c75..9bc410c6c56 100644 --- a/qemu-nbd.c +++ b/qemu-nbd.c @@ -937,7 +937,6 @@ int main(int argc, char **argv) g_autoptr(GError) err =3D NULL; int stderr_fd[2]; pid_t pid; - int ret; if (!g_unix_open_pipe(stderr_fd, FD_CLOEXEC, &err)) { error_report("Error setting up communication pipe: %s", @@ -1170,7 +1169,6 @@ int main(int argc, char **argv) if (opts.device) { #if HAVE_NBD_DEVICE - int ret; ret =3D pthread_create(&client_thread, NULL, nbd_client_thread, &o= pts); if (ret !=3D 0) { error_report("Failed to create client thread: %s", strerror(re= t)); @@ -1217,9 +1215,10 @@ int main(int argc, char **argv) qemu_opts_del(sn_opts); if (opts.device) { - void *ret; - pthread_join(client_thread, &ret); - exit(ret !=3D NULL); + void *result; + pthread_join(client_thread, &result); + ret =3D (intptr_t)result; + exit(ret); } else { exit(EXIT_SUCCESS); } --=20 2.41.0