linux-kernel - kernel build error due to large stack frame in __bch2_str_hash_check

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Message-ID: <CAG48ez3_ROkVPgh2CDqL26RdVgfMJvgtmDHB5FMSdrQ7-POeHg@mail.gmail.com>
Date: Tue, 21 Jan 2025 17:01:26 +0100
From: Jann Horn <jannh@...gle.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: linux-bcachefs@...r.kernel.org, kernel list <linux-kernel@...r.kernel.org>
Subject: kernel build error due to large stack frame in __bch2_str_hash_check_key

Hi!

I'm trying to build the mainline kernel at commit
95ec54a420b8f445e04a7ca0ea8deb72c51fe1d3 (upstream git master), but
the build fails with the following error:

```
[...]/fs/bcachefs/str_hash.c: In function ‘__bch2_str_hash_check_key’:
[...]/fs/bcachefs/str_hash.c:295:1: error: the frame size of 2400
bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
  295 | }
      | ^
cc1: all warnings being treated as errors
```

I am building with "gcc (Debian 14.2.0-3+build3) 14.2.0", using the
attached kernel config. I think this used to work with the mainline
kernel before the 6.14 merge window opened.

Download attachment ".config" of type "application/octet-stream" (154288 bytes)