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

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[ Upstream commit 9258227e9d ]

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: 7c105b63bd ("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 7fe169985c
commit d1c9aa8380
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/platforms/pseries/dtl.c
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@@ -185,7 +185,7 @@ 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 */