linux-kernel - [PATCH 20/37] MIPS: bitops: ins start position is always an immediate

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Date:   Mon, 30 Sep 2019 23:08:31 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
CC:     Huacai Chen <chenhc@...ote.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Paul Burton <pburton@...ecomp.com>
Subject: [PATCH 20/37] MIPS: bitops: ins start position is always an immediate

The start position for an ins instruction is always encoded as an
immediate, so allowing registers to be used by the inline asm makes no
sense. It should never happen anyway since a bit index should always be
small enough to be treated as an immediate, but remove the nonsensical
"r" for sanity.

Signed-off-by: Paul Burton <paul.burton@...s.com>
---

 arch/mips/include/asm/bitops.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h
index b8785bdf3507..83fd1f1c3ab4 100644
--- a/arch/mips/include/asm/bitops.h
+++ b/arch/mips/include/asm/bitops.h
@@ -85,7 +85,7 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *addr)
 			"	" __INS "%0, %3, %2, 1			\n"
 			"	" __SC "%0, %1				\n"
 			: "=&r" (temp), "+" GCC_OFF_SMALL_ASM() (*m)
-			: "ir" (bit), "r" (~0)
+			: "i" (bit), "r" (~0)
 			: __LLSC_CLOBBER);
 		} while (unlikely(!temp));
 		return;
@@ -150,7 +150,7 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *addr)
 			"	" __INS "%0, $0, %2, 1			\n"
 			"	" __SC "%0, %1				\n"
 			: "=&r" (temp), "+" GCC_OFF_SMALL_ASM() (*m)
-			: "ir" (bit)
+			: "i" (bit)
 			: __LLSC_CLOBBER);
 		} while (unlikely(!temp));
 		return;
@@ -383,7 +383,7 @@ static inline int test_and_clear_bit(unsigned long nr,
 			"	" __INS "%0, $0, %3, 1			\n"
 			"	" __SC	"%0, %1				\n"
 			: "=&r" (temp), "+" GCC_OFF_SMALL_ASM() (*m), "=&r" (res)
-			: "ir" (bit)
+			: "i" (bit)
 			: __LLSC_CLOBBER);
 		} while (unlikely(!temp));
 	} else {
-- 
2.23.0