linux-kernel - [PATCH] RISC-V: remove spin_unlock

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Date:   Wed,  8 Nov 2017 13:52:15 -0800
From:   Palmer Dabbelt <palmer@...belt.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     linux-kernel@...r.kernel.org, patches@...ups.riscv.org,
        Palmer Dabbelt <palmer@...belt.com>
Subject: [PATCH] RISC-V: remove spin_unlock_wait()

This was removed from the other architectures in commit
952111d7db02 ("arch: Remove spin_unlock_wait() arch-specific
definitions").  I don't want to rebase this into our outstanding patches
because they've already been reviewed, so I'm going to treat this as a
separate patch.

Signed-off-by: Palmer Dabbelt <palmer@...belt.com>
---
 arch/riscv/include/asm/spinlock.h | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/arch/riscv/include/asm/spinlock.h b/arch/riscv/include/asm/spinlock.h
index b3b394ffaf7e..7e06eee8f256 100644
--- a/arch/riscv/include/asm/spinlock.h
+++ b/arch/riscv/include/asm/spinlock.h
@@ -59,15 +59,6 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 	}
 }
 
-static inline void arch_spin_unlock_wait(arch_spinlock_t *lock)
-{
-	smp_rmb();
-	do {
-		cpu_relax();
-	} while (arch_spin_is_locked(lock));
-	smp_acquire__after_ctrl_dep();
-}
-
 /***********************************************************/
 
 static inline int arch_read_can_lock(arch_rwlock_t *lock)
-- 
2.13.6