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Message-ID: <ZWCRWArzbTYUjvon@finisterre.sirena.org.uk>
Date: Fri, 24 Nov 2023 12:04:40 +0000
From: Mark Brown <broonie@...nel.org>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	linux-kbuild@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	Matt Turner <mattst88@...il.com>, Vineet Gupta <vgupta@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mark Rutland <mark.rutland@....com>, Guo Ren <guoren@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ard Biesheuvel <ardb@...nel.org>,
	Huacai Chen <chenhuacai@...nel.org>,
	Greg Ungerer <gerg@...ux-m68k.org>, Michal Simek <monstr@...str.eu>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Dinh Nguyen <dinguyen@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Geoff Levand <geoff@...radead.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	"David S. Miller" <davem@...emloft.net>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	Helge Deller <deller@....de>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Timur Tabi <timur@...nel.org>,
	Kent Overstreet <kent.overstreet@...ux.dev>,
	David Woodhouse <dwmw2@...radead.org>,
	"Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	Kees Cook <keescook@...omium.org>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Nicolas Schier <nicolas@...sle.eu>,
	Al Viro <viro@...iv.linux.org.uk>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	linux-alpha@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-trace-kernel@...r.kernel.org, linux-csky@...r.kernel.org,
	loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org,
	linux-mips@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
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	linux-usb@...r.kernel.org, linux-fbdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linux-bcachefs@...r.kernel.org,
	linux-mtd@...ts.infradead.org,
	Aishwarya TCV <aishwarya.tcv@....com>
Subject: Re: [PATCH 15/22] arch: vdso: consolidate gettime prototypes

On Wed, Nov 08, 2023 at 01:58:36PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The VDSO functions are defined as globals in the kernel sources but intended
> to be called from userspace, so there is no need to declare them in a kernel
> side header.

This is in -next as commit 42874e4eb35bdfc54f8514685e50434098ba4f6c and
breaks an arm64 defconfig build, the 32 bit vDSO build is broken:

/build/stage/linux/arch/arm64/kernel/vdso32/vgettimeofday.c:10:5: error: conflic
ting types for ‘__vdso_clock_gettime’; have ‘int(clockid_t,  struct old_timespec
32 *)’ {aka ‘int(int,  struct old_timespec32 *)’}
   10 | int __vdso_clock_gettime(clockid_t clock,
      |     ^~~~~~~~~~~~~~~~~~~~
In file included from /build/stage/linux/arch/arm64/kernel/vdso32/vgettimeofday.
c:8:
/build/stage/linux/include/vdso/gettime.h:16:5: note: previous declaration of ‘__vdso_clock_gettime’ with type ‘int(clockid_t,  struct __kernel_timespec *)’ {aka ‘int(int,  struct __kernel_timespec *)’}
   16 | int __vdso_clock_gettime(clockid_t clock, struct __kernel_timespec *ts);
      |     ^~~~~~~~~~~~~~~~~~~~
/build/stage/linux/arch/arm64/kernel/vdso32/vgettimeofday.c:28:5: error: conflicting types for ‘__vdso_clock_getres’; have ‘int(clockid_t,  struct old_timespec32 *)’ {aka ‘int(int,  struct old_timespec32 *)’}
   28 | int __vdso_clock_getres(clockid_t clock_id,
      |     ^~~~~~~~~~~~~~~~~~~
/build/stage/linux/include/vdso/gettime.h:15:5: note: previous declaration of ‘__vdso_clock_getres’ with type ‘int(clockid_t,  struct __kernel_timespec *)’ {aka ‘int(int,  struct __kernel_timespec *)’}
   15 | int __vdso_clock_getres(clockid_t clock, struct __kernel_timespec *res);
      |     ^~~~~~~~~~~~~~~~~~~

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