The patch titled
Subject: asm-generic: barrier.h: fix ALPHA builds when SMP is not enabled
has been added to the -mm tree. Its filename is
compilerh-fix-barrier_data-on-clang-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/compilerh-fix-barrier_data-on-clang-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/compilerh-fix-barrier_data-on-clang-fix.patch
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------------------------------------------------------
From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Subject: asm-generic: barrier.h: fix ALPHA builds when SMP is not enabled
<asm-generic/barrier.h> uses barrier() but needs to #include
<linux/compiler.h> to get a generic definition of it to fix
build errors in arch/alpha/ builds when CONFIG_SMP is not enabled.
Fixes build errors like this (there are several like this):
[49 in the kernel config that was supplied by the 0day bot]
In file included from ../arch/alpha/include/asm/barrier.h:21,
from ../arch/alpha/include/asm/atomic.h:6,
from ../include/linux/atomic.h:7,
from ../include/linux/dcache.h:5,
from ../fs/proc/util.c:1:
../arch/alpha/include/asm/atomic.h: In function 'atomic_add_return_relaxed':
../include/asm-generic/barrier.h:78:18: error: implicit declaration of function 'barrier' [-Werror=implicit-function-declaration]
78 | #define smp_mb() barrier()
| ^~~~~~~
Link: https://lkml.kernel.org/r/20201101231835.4589-1-rdunlap@xxxxxxxxxxxxx
Fixes: 885df91ca357 ("Create asm-generic/barrier.h")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/barrier.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/asm-generic/barrier.h~compilerh-fix-barrier_data-on-clang-fix
+++ a/include/asm-generic/barrier.h
@@ -13,6 +13,7 @@
#ifndef __ASSEMBLY__
+#include <linux/compiler.h>
#include <asm/rwonce.h>
#ifndef nop
_
Patches currently in -mm which might be from rdunlap@xxxxxxxxxxxxx are
compilerh-fix-barrier_data-on-clang-fix.patch
procfs-delete-duplicated-words-other-fixes.patch
