APPLIED Re: [SRU][P][PATCH 0/1] UBUNTU: SAUCE: powerpc64/ftrace: fail to load i40e driver at boot time (LP: #2104297)

[Timo Aaltonen]

Massimiliano Pellizzer kirjoitti 4.4.2025 klo 11.11:
> BugLink: https://bugs.launchpad.net/bugs/2104297
> 
> [ Impact ]
> 
> In ppc64el kernels, loading modules without any
> __patchable_function_entries section would fail due to a
> zero size allocation of executable memory for ftrace trampolines.
> This causes boot failures when trying to boot the kernel on IBM Power 9
> systems. In particular becasue IBM Power 9 tries to load i40e at boot
> time, which fails.
> 
> The bug was introduced by commit eec37961a56a which landed in v6.13-rc1,
> which assumed all modules have traceable functions.
> 
> [ Fix ]
> 
> Apply the following patch:
> - https://lore.kernel.org/all/wlscshbqan2svtqkz5xc6v47tzndfnsvge7h4lbfn67zoplekl@elt2oxwhrp6f/T/
> which has not landed in linux-next yet.
> 
> [ Test Plan ]
> 
> Compile and boot test the kernel on a Power 9 bare metal machine.
> 
> [ Where problems could occur ]
> 
> The patch simply removes an if branch which handles (incorrectly) errors during
> module loading on ppc64 systems. The regression potential therefore is
> very low.
> 
> 
> Massimiliano Pellizzer (1):
>    UBUNTU: SAUCE: powerpc64/ftrace: fix module loading without patchable
>      function entries
> 
>   arch/powerpc/kernel/module_64.c | 4 ----
>   1 file changed, 4 deletions(-)
> 

this got applied already, thanks


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