[PATCH v2 04/33] locking/atomic: microblaze: use asm-generic exclusively

From: Mark Rutland
Date: Tue May 25 2021 - 10:04:34 EST

Microblaze provides its own implementation of atomic_dec_if_positive(),
but nothing else. For a while now, the conditional inc/dec ops have been
optional, and the core code will provide generic implementations using
the code templates in scripts/atomic/fallbacks/.

For simplicity, and for consistency with the other conditional atomic
ops, let's drop the microblaze implementation of
atomic_dec_if_positive(), and use the generic implementation.

With that, we can also drop the local asm/atomic.h and asm/cmpxchg.h
headers, as asm-generic/atomic.h is mandatory-y, and we can pull in
asm-generic/cmpxchg.h via generic-y. This matches what nios2 and nds32
do today.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Boqun Feng <boqun.feng@xxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
arch/microblaze/include/asm/Kbuild | 1 +
arch/microblaze/include/asm/atomic.h | 28 ----------------------------
arch/microblaze/include/asm/cmpxchg.h | 9 ---------
3 files changed, 1 insertion(+), 37 deletions(-)
delete mode 100644 arch/microblaze/include/asm/atomic.h
delete mode 100644 arch/microblaze/include/asm/cmpxchg.h

diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 29b0e557aa7c..a055f5dbe00a 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
generated-y += syscall_table.h
+generic-y += cmpxchg.h
generic-y += extable.h
generic-y += kvm_para.h
generic-y += mcs_spinlock.h
diff --git a/arch/microblaze/include/asm/atomic.h b/arch/microblaze/include/asm/atomic.h
deleted file mode 100644
index 41e9aff23a62..000000000000
diff --git a/arch/microblaze/include/asm/cmpxchg.h b/arch/microblaze/include/asm/cmpxchg.h
deleted file mode 100644
index 3523b51aab36..000000000000