On Wed, Mar 15, 2023 at 01:10:04PM +0000, Conor Dooley wrote:
> Hey Greg,
>
> Looks like the authorship for this commit has been lost as part of
> backporting.
>
> On Wed, Mar 15, 2023 at 01:13:36PM +0100, Greg Kroah-Hartman wrote:
> > [ Upstream commit 9493e6f3ce02f44c21aa19f3cbf3b9aa05479d06 ]
> >
> > Guenter reported a splat during boot, that Samuel pointed out was the
> > lockdep assertion failing in patch_insn_write():
> >
> > WARNING: CPU: 0 PID: 0 at arch/riscv/kernel/patch.c:63 patch_insn_write+0x222/0x2f6
> > epc : patch_insn_write+0x222/0x2f6
> > ra : patch_insn_write+0x21e/0x2f6
> > epc : ffffffff800068c6 ra : ffffffff800068c2 sp : ffffffff81803df0
> > gp : ffffffff81a1ab78 tp : ffffffff81814f80 t0 : ffffffffffffe000
> > t1 : 0000000000000001 t2 : 4c45203a76637369 s0 : ffffffff81803e40
> > s1 : 0000000000000004 a0 : 0000000000000000 a1 : ffffffffffffffff
> > a2 : 0000000000000004 a3 : 0000000000000000 a4 : 0000000000000001
> > a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000052464e43
> > s2 : ffffffff80b4889c s3 : 000000000000082c s4 : ffffffff80b48828
> > s5 : 0000000000000828 s6 : ffffffff8131a0a0 s7 : 0000000000000fff
> > s8 : 0000000008000200 s9 : ffffffff8131a520 s10: 0000000000000018
> > s11: 000000000000000b t3 : 0000000000000001 t4 : 000000000000000d
> > t5 : ffffffffd8180000 t6 : ffffffff81803bc8
> > status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
> > [<ffffffff800068c6>] patch_insn_write+0x222/0x2f6
> > [<ffffffff80006a36>] patch_text_nosync+0xc/0x2a
> > [<ffffffff80003b86>] riscv_cpufeature_patch_func+0x52/0x98
> > [<ffffffff80003348>] _apply_alternatives+0x46/0x86
> > [<ffffffff80c02d36>] apply_boot_alternatives+0x3c/0xfa
> > [<ffffffff80c03ad8>] setup_arch+0x584/0x5b8
> > [<ffffffff80c0075a>] start_kernel+0xa2/0x8f8
> >
> > This issue was exposed by 702e64550b12 ("riscv: fpu: switch has_fpu() to
> > riscv_has_extension_likely()"), as it is the patching in has_fpu() that
> > triggers the splats in Guenter's report.
> >
> > Take the text_mutex before doing any code patching to satisfy lockdep.
> >
> > Fixes: ff689fd21cb1 ("riscv: add RISC-V Svpbmt extension support")
> > Fixes: a35707c3d850 ("riscv: add memory-type errata for T-Head")
> > Fixes: 1a0e5dbd3723 ("riscv: sifive: Add SiFive alternative ports")
> > Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> > Link: https://lore.kernel.org/all/20230212154333.GA3760469@xxxxxxxxxxxx/
> > Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>
> The original author on the submitted patch matched this signoff here,
> not sure what went wrong along the way.
I do not understand, sorry, the signed off by area of this commit in the
queue seems to match up with what is in Linus's tree with the exception
that Sasha:
> > Reviewed-by: Samuel Holland <samuel@xxxxxxxxxxxx>
> > Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> > Link: https://lore.kernel.org/r/20230212194735.491785-1-conor@xxxxxxxxxx
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
> > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
Added himself to the end of it.
What exactly is not correct here?
confused,
greg k-h
