riscv gcc-13 allyesconfig error the frame size of 2064 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

Regressions on riscv allyesconfig build failed with gcc-13 on the Linux next
tag next-20250516 and next-20250522.

First seen on the next-20250516
 Good: next-20250515
 Bad:  next-20250516

Regressions found on riscv:
 - build/gcc-13-allyesconfig

Regression Analysis:
 - New regression? Yes
 - Reproducible? Yes

Build regression: riscv gcc-13 allyesconfig error the frame size of
2064 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]

Reported-by: Linux Kernel Functional Testing <[email protected]>

## Build log
fs/bcachefs/data_update.c: In function '__bch2_data_update_index_update':
fs/bcachefs/data_update.c:464:1: error: the frame size of 2064 bytes
is larger than 2048 bytes [-Werror=frame-larger-than=]
  464 | }
      | ^
cc1: all warnings being treated as errors


## Source
* Kernel version: 6.15.0-rc7
* Git tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/next/linux-next.git
* Git sha: 460178e842c7a1e48a06df684c66eb5fd630bcf7
* Git describe: next-20250522

## Build
* Build log: https://qa-reports.linaro.org/api/testruns/28521854/log_file/
* Build history:
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20250522/testrun/28521854/suite/build/test/gcc-13-allyesconfig/history/
* Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2xRoAAw5dl69AvvHb8oZ3pL1SFx/
* Kernel config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2xRoAAw5dl69AvvHb8oZ3pL1SFx/config

--
Linaro LKFT
https://lkft.linaro.org