From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Anton Blanchard <anton@linux.ibm.com>,
Nicholas Piggin <npiggin@gmail.com>,
Gustavo Romero <gromero@linux.ibm.com>
Subject: [PATCH 1/3] powerpc/64s: restore_math remove TM test
Date: Wed, 24 Jun 2020 09:41:37 +1000 [thread overview]
Message-ID: <20200623234139.2262227-1-npiggin@gmail.com> (raw)
The TM test in restore_math added by commit dc16b553c949e ("powerpc:
Always restore FPU/VEC/VSX if hardware transactional memory in use") is
no longer necessary after commit a8318c13e79ba ("powerpc/tm: Fix
restoring FP/VMX facility incorrectly on interrupts"), which removed
the cases where restore_math has to restore if TM is active.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kernel/process.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 7bb7faf84490..c6c1add91bf3 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -530,8 +530,7 @@ void notrace restore_math(struct pt_regs *regs)
{
unsigned long msr;
- if (!MSR_TM_ACTIVE(regs->msr) &&
- !current->thread.load_fp && !loadvec(current->thread))
+ if (!current->thread.load_fp && !loadvec(current->thread))
return;
msr = regs->msr;
--
2.23.0
next reply other threads:[~2020-06-23 23:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 23:41 Nicholas Piggin [this message]
2020-06-23 23:41 ` [PATCH 2/3] powerpc/64s: Fix restore_math unnecessarily changing MSR Nicholas Piggin
2020-06-23 23:41 ` [PATCH 3/3] powerpc: re-initialise lazy FPU/VEC counters on every fault Nicholas Piggin
2020-07-16 12:56 ` [PATCH 1/3] powerpc/64s: restore_math remove TM test Michael Ellerman
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