Re: [PATCH][next] cgroup: Avoid -Wstringop-overflow warnings

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Hi!

On 6/22/23 04:20, Krzysztof Kozlowski wrote:
On 15/06/2023 03:18, Gustavo A. R. Silva wrote:
Address the following -Wstringop-overflow warnings seen when
built with ARM architecture and aspeed_g4_defconfig configuration
(notice that under this configuration CGROUP_SUBSYS_COUNT == 0):
kernel/cgroup/cgroup.c:1208:16: warning: 'find_existing_css_set' accessing 4 bytes in a region of size 0 [-Wstringop-overflow=]
kernel/cgroup/cgroup.c:1258:15: warning: 'css_set_hash' accessing 4 bytes in a region of size 0 [-Wstringop-overflow=]
kernel/cgroup/cgroup.c:6089:18: warning: 'css_set_hash' accessing 4 bytes in a region of size 0 [-Wstringop-overflow=]
kernel/cgroup/cgroup.c:6153:18: warning: 'css_set_hash' accessing 4 bytes in a region of size 0 [-Wstringop-overflow=]


Hi,

This patch landed in next but causes boot failures on
Exynos ARMv7 board (32 bit) with systemd (exynos_defconfig):

NFS-Mount: 192.168.1.10:/srv/nfs/odroidhc1
Waiting 10 seconds for device /dev/nfs ...
ERROR: device '/dev/nfs' not found. Skipping fsck.
Mount cmd:
mount.nfs4 -o vers=4,nolock 192.168.1.10:/srv/nfs/odroidhc1 /new_root
:: running cleanup hook [udev]
[   23.752917] systemd[1]: System time before build time, advancing clock.
[   23.851828] systemd[1]: Failed to mount tmpfs at /sys/fs/cgroup: No such file or directory
[   23.868459] systemd[1]: Failed to mount cgroup at /sys/fs/cgroup/systemd: No such file or directory
[!!!!!!] Failed to mount API filesystems.
[   23.914562] systemd[1]: Freezing execution.

Full log:
https://krzk.eu/#/builders/21/builds/4110/steps/15/logs/serial0

Thanks for reporting this issue. I'll take a look.

--
Gustavo



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