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@graysky Sorry.

@bezirg - Not out-of-date, see the pinned comment.

@graysky

Greg has removed broken patch.

@graysky:

I've compiled 5.3.7-rc1 from git. I've added:

https://github.com/sirlucjan/kernel-patches/blob/master/5.3/iouring-patches/0001-Revert-io_uring-only-flush-workqueues-on-fileset-rem.patch

@graysky

I compiled directly from the git repository. I was getting an analogous error.

@sir_lucjan - if you look at the PKGBUILD you'll see how I'm grabbing the patch but when I compare it to the http stable-review directory, there isn't a 5.3.7rc1 tarball. Also, there's nothing about on that I found on lkml. In the past, attempting to download the patch in this fashion gives a 0-byte file.

@sir_lucjan - I get similar after about 29 min of building:

  CC      net/ipv4/udp_offload.o   CC [M]  drivers/fpga/dfl-afu-region.o   CC      net/ipv6/xfrm6_protocol.o   CC      drivers/firmware/efi/dev-path-parser.o In file included from fs/io_uring.c:42: fs/io_uring.c: In function ‘io_destruct_skb’: ./include/linux/kernel.h:47:52: error: invalid use of undefined type ‘struct workqueue_struct’    47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))       |                                                    ^ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’  2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)       |                  ^~~~~~~~~~ ./include/linux/kernel.h:47:52: error: dereferencing pointer to incomplete type ‘struct workqueue_struct’    47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))       |                                                    ^ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’  2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)       |                  ^~~~~~~~~~ In file included from ./include/linux/kernel.h:16,                  from fs/io_uring.c:42: ./include/linux/compiler.h:357:67: error: invalid use of undefined type ‘struct workqueue_struct’   357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))       |                                                                   ^ ./include/linux/build_bug.h:16:56: note: in definition of macro ‘BUILD_BUG_ON_ZERO’    16 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))       |                                                        ^ ./include/linux/compiler.h:357:46: note: in expansion of macro ‘__same_type’   357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))       |                                              ^~~~~~~~~~~ ./include/linux/kernel.h:47:59: note: in expansion of macro ‘__must_be_array’    47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))       |                                                           ^~~~~~~~~~~~~~~ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’  2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)       |                  ^~~~~~~~~~ ./include/linux/build_bug.h:16:45: error: bit-field ‘<anonymous>’ width not an integer constant    16 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))       |                                             ^ ./include/linux/compiler.h:357:28: note: in expansion of macro ‘BUILD_BUG_ON_ZERO’   357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))       |                            ^~~~~~~~~~~~~~~~~ ./include/linux/kernel.h:47:59: note: in expansion of macro ‘__must_be_array’    47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))       |                                                           ^~~~~~~~~~~~~~~ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’  2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)       |                  ^~~~~~~~~~ fs/io_uring.c:2571:18: error: invalid use of undefined type ‘struct workqueue_struct’  2571 |   if (ctx->sqo_wq[i])       |                  ^ fs/io_uring.c:2572:31: error: invalid use of undefined type ‘struct workqueue_struct’  2572 |    flush_workqueue(ctx->sqo_wq[i]);       |                               ^   CC [M]  sound/soc/codecs/max9867.o make[1]: *** [scripts/Makefile.build:281: fs/io_uring.o] Error 1 make: *** [Makefile:1085: fs] Error 2 make: *** Waiting for unfinished jobs.... 

I got an error:

In file included from fs/io_uring.c:42: fs/io_uring.c: In function ‘io_destruct_skb’: ./include/linux/kernel.h:47:52: error: invalid use of undefined type ‘struct workqueue_struct’   47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))      |                                                    ^ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’ 2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)      |                  ^~~~~~~~~~ ./include/linux/kernel.h:47:52: error: dereferencing pointer to incomplete type ‘struct workqueue_struct’   47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))      |                                                    ^ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’ 2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)      |                  ^~~~~~~~~~ In file included from ./include/linux/kernel.h:16,                 from fs/io_uring.c:42: ./include/linux/compiler.h:357:67: error: invalid use of undefined type ‘struct workqueue_struct’  357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))      |                                                                   ^ ./include/linux/build_bug.h:16:56: note: in definition of macro ‘BUILD_BUG_ON_ZERO’   16 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))      |                                                        ^ ./include/linux/compiler.h:357:46: note: in expansion of macro ‘__same_type’  357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))      |                                              ^~~~~~~~~~~ ./include/linux/kernel.h:47:59: note: in expansion of macro ‘__must_be_array’   47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))      |                                                           ^~~~~~~~~~~~~~~ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’ 2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)      |                  ^~~~~~~~~~ ./include/linux/build_bug.h:16:45: error: bit-field ‘<anonymous>’ width not an integer constant   16 | #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:(-!!(e)); }))      |                                             ^ ./include/linux/compiler.h:357:28: note: in expansion of macro ‘BUILD_BUG_ON_ZERO’  357 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))      |                            ^~~~~~~~~~~~~~~~~ ./include/linux/kernel.h:47:59: note: in expansion of macro ‘__must_be_array’   47 | #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))      |                                                           ^~~~~~~~~~~~~~~ fs/io_uring.c:2570:18: note: in expansion of macro ‘ARRAY_SIZE’ 2570 |  for (i = 0; i < ARRAY_SIZE(ctx->sqo_wq); i++)      |                  ^~~~~~~~~~ fs/io_uring.c:2571:18: error: invalid use of undefined type ‘struct workqueue_struct’ 2571 |   if (ctx->sqo_wq[i])      |                  ^ fs/io_uring.c:2572:31: error: invalid use of undefined type ‘struct workqueue_struct’ 2572 |    flush_workqueue(ctx->sqo_wq[i]);      |                               ^ make[1]: *** [scripts/Makefile.build:281: fs/io_uring.o] 

Could you confirm?

@Minzord - Why did you flag this as out-of-date?