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powerpc/pseries: Fix how we iterate over the DTL entries

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[ Upstream commit 9258227e9dd1da8feddb07ad9702845546a581c9 ]

When CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set, we look up dtl_idx in
the lppaca to determine the number of entries in the buffer. Since
lppaca is in big endian, we need to do an endian conversion before using
this in our calculation to determine the number of entries in the
buffer. Without this, we do not iterate over the existing entries in the
DTL buffer properly.

Fixes: 7c105b63bd98 ("powerpc: Add CONFIG_CPU_LITTLE_ENDIAN kernel config option.")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Naveen N. Rao 2018-09-27 13:40:58 +05:30 committed by Greg Kroah-Hartman
parent 4d1af1c64f
commit 5c07e4774c
1 changed files with 1 additions and 1 deletions
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arch/powerpc/platforms/pseries/dtl.c
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@ -184,7 +184,7 @@ static void dtl_stop(struct dtl *dtl)
static u64 dtl_current_index(struct dtl *dtl)
{
return lppaca_of(dtl->cpu).dtl_idx;
return be64_to_cpu(lppaca_of(dtl->cpu).dtl_idx);
}
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */