linux-kernel - [PATCH v2 08/27] locking/atomic: m68k: add preprocessor symbols

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230605070124.3741859-9-mark.rutland@arm.com>
Date:   Mon,  5 Jun 2023 08:01:05 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     linux-kernel@...r.kernel.org
Cc:     akiyks@...il.com, boqun.feng@...il.com, corbet@....net,
        keescook@...omium.org, linux@...linux.org.uk,
        linux-doc@...r.kernel.org, mark.rutland@....com,
        mchehab@...nel.org, paulmck@...nel.org, peterz@...radead.org,
        rdunlap@...radead.org, sstabellini@...nel.org, will@...nel.org
Subject: [PATCH v2 08/27] locking/atomic: m68k: add preprocessor symbols

Some atomics can be implemented in several different ways, e.g.
FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of
RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms
of FULL ordered atomics. Other atomics are optional, and don't exist in
some configurations (e.g. not all architectures implement the 128-bit
cmpxchg ops).

Subsequent patches will require that architectures define a preprocessor
symbol for any atomic (or ordering variant) which is optional. This will
make the fallback ifdeffery more robust, and simplify future changes.

Add the required definitions to arch/m68k.

Signed-off-by: Mark Rutland <mark.rutland@....com>
Reviewed-by: Kees Cook <keescook@...omium.org>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: Paul E. McKenney <paulmck@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Will Deacon <will@...nel.org>
---
 arch/m68k/include/asm/atomic.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/m68k/include/asm/atomic.h b/arch/m68k/include/asm/atomic.h
index 190a032f19be7..4bfbc25f6ecf4 100644
--- a/arch/m68k/include/asm/atomic.h
+++ b/arch/m68k/include/asm/atomic.h
@@ -106,6 +106,11 @@ static inline int arch_atomic_fetch_##op(int i, atomic_t * v)		\
 ATOMIC_OPS(add, +=, add)
 ATOMIC_OPS(sub, -=, sub)
 
+#define arch_atomic_add_return			arch_atomic_add_return
+#define arch_atomic_sub_return			arch_atomic_sub_return
+#define arch_atomic_fetch_add			arch_atomic_fetch_add
+#define arch_atomic_fetch_sub			arch_atomic_fetch_sub
+
 #undef ATOMIC_OPS
 #define ATOMIC_OPS(op, c_op, asm_op)					\
 	ATOMIC_OP(op, c_op, asm_op)					\
@@ -115,6 +120,10 @@ ATOMIC_OPS(and, &=, and)
 ATOMIC_OPS(or, |=, or)
 ATOMIC_OPS(xor, ^=, eor)
 
+#define arch_atomic_fetch_and			arch_atomic_fetch_and
+#define arch_atomic_fetch_or			arch_atomic_fetch_or
+#define arch_atomic_fetch_xor			arch_atomic_fetch_xor
+
 #undef ATOMIC_OPS
 #undef ATOMIC_FETCH_OP
 #undef ATOMIC_OP_RETURN
-- 
2.30.2