linux-kernel - Re: spinlock.c:306:9: error: implicit declaration of function '__raw_write_lock

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Date:   Wed, 24 Nov 2021 01:31:57 -0600
From:   Rob Landley <rob@...dley.net>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-sh list <linux-sh@...r.kernel.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Minchan Kim <minchan@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Galbraith <umgwanakikbuti@...il.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, lkft-triage@...ts.linaro.org
Subject: Re: spinlock.c:306:9: error: implicit declaration of function
 '__raw_write_lock_nested'

On 11/23/21 5:38 AM, Naresh Kamboju wrote:
> While building Linux next 20211123 tag for sh with gcc-11
> following warnings / errors noticed.
> 
> make --silent --keep-going --jobs=8
> O=/home/tuxbuild/.cache/tuxmake/builds/current ARCH=sh
> CROSS_COMPILE=sh4-linux-gnu- 'CC=sccache sh4-linux-gnu-gcc'
> 'HOSTCC=sccache gcc'
>   Generating include/generated/machtypes.h
> <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
> <stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]

Here's a fix for those first two:

From: Rob Landley <rob@...dley.net>

Wire up clone3 and futex_waitv syscalls for arch/sh

Signed-off-by: Rob Landley <rob@...dley.net>
---

 arch/sh/kernel/syscalls/syscall.tbl |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/sh/kernel/syscalls/syscall.tbl
b/arch/sh/kernel/syscalls/syscall.tbl
index 208f131659c5..65c3a94bff48 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -437,7 +437,7 @@
 432	common	fsmount				sys_fsmount
 433	common	fspick				sys_fspick
 434	common	pidfd_open			sys_pidfd_open
-# 435 reserved for clone3
+435	common	clone3				sys_clone3
 436	common	close_range			sys_close_range
 437	common	openat2				sys_openat2
 438	common	pidfd_getfd			sys_pidfd_getfd
@@ -451,3 +451,4 @@
 446	common	landlock_restrict_self		sys_landlock_restrict_self
 # 447 reserved for memfd_secret
 448	common	process_mrelease		sys_process_mrelease
+449	common	futex_waitv			sys_futex_waitv

Rob