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powerpc/40x: Fix assembler warning about r0

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The assembler says:
  arch/powerpc/kernel/head_40x.S:623: Warning: invalid register expression

It's objecting to the use of r0 as the RA argument. That's because
when RA = 0 the literal value 0 is used, rather than the content of
r0, making the use of r0 in the source potentially confusing.

Fix it to use a literal 0, the generated code is identical.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200722022422.825197-1-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2020-07-22 12:24:22 +10:00
parent af0870c4e7
commit 8d8a629d00
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/head_40x.S
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@ -620,7 +620,7 @@ start_here:
ori r6, r6, swapper_pg_dir@l
lis r5, abatron_pteptrs@h
ori r5, r5, abatron_pteptrs@l
stw r5, 0xf0(r0) /* Must match your Abatron config file */
stw r5, 0xf0(0) /* Must match your Abatron config file */
tophys(r5,r5)
stw r6, 0(r5)