linux-kernel - Re: [PATCH net-next v3 04/13] tools: ynl-gen: refactor local vars for .attr

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Message-ID: <m2a52zvrra.fsf@gmail.com>
Date: Fri, 12 Sep 2025 12:23:37 +0100
From: Donald Hunter <donald.hunter@...il.com>
To: Asbjørn Sloth Tønnesen
 <ast@...erby.net>
Cc: "Jason A. Donenfeld" <Jason@...c4.com>,  "David S. Miller"
 <davem@...emloft.net>,  Eric Dumazet <edumazet@...gle.com>,  Jakub
 Kicinski <kuba@...nel.org>,  Paolo Abeni <pabeni@...hat.com>,  Simon
 Horman <horms@...nel.org>,  Jacob Keller <jacob.e.keller@...el.com>,
  Sabrina Dubroca <sd@...asysnail.net>,  wireguard@...ts.zx2c4.com,
  netdev@...r.kernel.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v3 04/13] tools: ynl-gen: refactor local vars
 for .attr_put() callers

Asbjørn Sloth Tønnesen <ast@...erby.net> writes:

> Refactor the generation of local variables needed when building
> requests, by moving the logic into the Type classes, and use the
> same helper in all places where .attr_put() is called.
>
> If any attributes requests identical local_vars, then they will
> be deduplicated, attributes are assumed to only use their local
> variables transiently.
>
> This patch fixes the build errors below:
> $ make -C tools/net/ynl/generated/
> [...]
> -e      GEN wireguard-user.c
> -e      GEN wireguard-user.h
> -e      CC wireguard-user.o
> wireguard-user.c: In function ‘wireguard_get_device_dump’:
> wireguard-user.c:480:9: error: ‘array’ undeclared (first use in func)
>   480 |         array = ynl_attr_nest_start(nlh, WGDEVICE_A_PEERS);
>       |         ^~~~~
> wireguard-user.c:480:9: note: each undeclared identifier is reported
>                         only once for each function it appears in
> wireguard-user.c:481:14: error: ‘i’ undeclared (first use in func)
>   481 |         for (i = 0; i < req->_count.peers; i++)
>       |              ^
> wireguard-user.c: In function ‘wireguard_set_device’:
> wireguard-user.c:533:9: error: ‘array’ undeclared (first use in func)
>   533 |         array = ynl_attr_nest_start(nlh, WGDEVICE_A_PEERS);
>       |         ^~~~~
> make: *** [Makefile:52: wireguard-user.o] Error 1
> make: Leaving directory '/usr/src/linux/tools/net/ynl/generated'
>
> Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>

Reviewed-by: Donald Hunter <donald.hunter@...il.com>