Compilation error with Werror option about libvfio-user HOT 2 CLOSED

base on latest commit

00:00:43.648 Scanning dependencies of target test_dma_map
00:00:43.654 In file included from /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/dma.c:44:
00:00:43.654 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/dma.h: In function ‘dma_unmap_addr’:
00:00:43.654 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/dma.h:303:9: error: variable ‘r’ set but not used [-Werror=unused-but-set-variable]
00:00:43.654 303 | int r;
00:00:43.654 | ^
00:00:43.654 cc1: all warnings being treated as errors
00:00:43.654 make[5]: *** [lib/CMakeFiles/muser.dir/build.make:83: lib/CMakeFiles/muser.dir/dma.c.o] Error 1
00:00:43.655 make[5]: *** Waiting for unfinished jobs....
00:00:43.658 [ 17%] Building C object samples/CMakeFiles/client.dir//lib/libmuser.c.o
00:00:43.661 [ 21%] Building C object samples/CMakeFiles/test_dma_map.dir/test_dma_map.c.o
00:00:43.663 Scanning dependencies of target test_mmap
00:00:43.669 Scanning dependencies of target test_read
00:00:43.677 [ 26%] Building C object samples/CMakeFiles/test_mmap.dir/test_mmap.c.o
00:00:43.679 [ 30%] Linking C executable test_dma_map
00:00:43.681 [ 34%] Building C object samples/CMakeFiles/test_read.dir/test_read.c.o
00:00:43.693 [ 39%] Linking C executable test_mmap
00:00:43.699 [ 43%] Linking C executable test_read
00:00:43.723 [ 43%] Built target test_dma_map
00:00:43.738 [ 43%] Built target test_mmap
00:00:43.748 [ 43%] Built target test_read
00:00:44.078 [ 47%] Building C object samples/CMakeFiles/client.dir//lib/libmuser_pci.c.o
00:00:44.218 [ 52%] Building C object samples/CMakeFiles/client.dir/__/lib/dma.c.o
00:00:44.326 In file included from /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:59:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/dma.h: In function ‘dma_unmap_addr’:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/dma.h:303:9: error: variable ‘r’ set but not used [-Werror=unused-but-set-variable]
00:00:44.326 303 | int r;
00:00:44.326 | ^
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c: In function ‘recv_blocking’:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:143:14: error: variable ‘fret’ set but not used [-Werror=unused-but-set-variable]
00:00:44.326 143 | int ret, fret;
00:00:44.326 | ^~~~
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c: In function ‘dev_get_info’:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:1083:24: error: unused parameter ‘lm_ctx’ [-Werror=unused-parameter]
00:00:44.326 1083 | dev_get_info(lm_ctx_t *lm_ctx, struct vfio_device_info *dev_info)
00:00:44.326 | ~~~~~~~~~~^~~~~~
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c: In function ‘handle_device_set_irqs’:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:743:18: error: ‘data’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
00:00:44.326 743 | i++, d32++) {
00:00:44.326 | ~~~^~
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:1766:11: note: ‘data’ was declared here
00:00:44.326 1766 | void *data;
00:00:44.326 | ^~~~
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c: In function ‘process_request’:
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:1952:9: error: ‘ret’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
00:00:44.326 1952 | lm_log(lm_ctx, LM_ERR, "bad region access acount, expected=%d, actual=%d",
00:00:44.326 | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00:00:44.326 1953 | region_access.count, ret);
00:00:44.326 | ~~~~~~~~~~~~~~~~~~~~~~~~~
00:00:44.326 /var/jenkins/workspace/crypto-autotest/spdk/muser/lib/libmuser.c:1600:9: note: ‘ret’ was declared here
00:00:44.326 1600 | int ret;
00:00:44.326 | ^~~
00:00:44.326 cc1: all warnings being treated as errors
00:00:44.326 make[5]: *** [lib/CMakeFiles/muser.dir/build.make:96: lib/CMakeFiles/muser.dir/libmuser.c.o] Error 1
00:00:44.326 make[4]: *** [CMakeFiles/Makefile2:147: lib/CMakeFiles/muser.dir/all] Error 2

from libvfio-user.

Fixes are merged into master.

from libvfio-user.