From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
To: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org,
Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Subject: [PATCH] ARCv2: Don't pretend we may set U & DE bits in STATUS32 with kflag
Date: Tue, 16 Jul 2019 23:50:34 +0300 [thread overview]
Message-ID: <20190716205034.42466-1-abrodkin@synopsys.com> (raw)
As per PRM "kflag" instruction doesn't change state of
DE-flag ("Delayed branch is pending") and U-flag ("User mode")
in STATUS32 register so let's not act as if we can affect those bits.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
---
arch/arc/include/asm/entry-arcv2.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h
index 225e7df2d8ed..6558e2edb583 100644
--- a/arch/arc/include/asm/entry-arcv2.h
+++ b/arch/arc/include/asm/entry-arcv2.h
@@ -237,7 +237,7 @@
.macro FAKE_RET_FROM_EXCPN
lr r9, [status32]
- bic r9, r9, (STATUS_U_MASK|STATUS_DE_MASK|STATUS_AE_MASK)
+ bic r9, r9, STATUS_AE_MASK
or r9, r9, STATUS_IE_MASK
kflag r9
.endm
--
2.16.2
next reply other threads:[~2019-07-16 20:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-16 20:50 Alexey Brodkin [this message]
2019-07-17 18:35 ` Vineet Gupta
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