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From: Arnd Bergmann <arnd@arndb.de>
To: y2038@lists.linaro.org, linux-api@vger.kernel.org,
	linux-kernel@vger.kernel.org
Cc: dalias@libc.org, linux-ia64@vger.kernel.org,
	linux-sh@vger.kernel.org, catalin.marinas@arm.com,
	will.deacon@arm.com, linux@dominikbrodowski.net,
	jcmvbkbc@gmail.com, deepa.kernel@gmail.com, hpa@zytor.com,
	sparclinux@vger.kernel.org, linux-s390@vger.kernel.org,
	dave@stgolabs.net, mpe@ellerman.id.au, deller@gmx.de,
	x86@kernel.org, linux@armlinux.org.uk, mingo@redhat.com,
	geert@linux-m68k.org, firoz.khan@linaro.org, mattst88@gmail.com,
	fenghua.yu@intel.com, Arnd Bergmann <arnd@arndb.de>,
	heiko.carstens@de.ibm.com, linux-m68k@lists.linux-m68k.org,
	ink@jurassic.park.msu.ru, luto@kernel.org, tglx@linutronix.de,
	linux-arm-kernel@lists.infradead.org, monstr@monstr.eu,
	tony.luck@intel.com, linux-parisc@vger.kernel.org,
	linux-mips@vger.kernel.org, paul.burton@mips.com,
	ebiederm@xmission.com, linux-alpha@vger.kernel.org,
	schwidefsky@de.ibm.com, akpm@linux-foundation.org, linuxppc-dev
Subject: [PATCH 06/15] ARM: add migrate_pages() system call
Date: Thu, 10 Jan 2019 17:24:26 +0100	[thread overview]
Message-ID: <20190110162435.309262-7-arnd@arndb.de> (raw)
In-Reply-To: <20190110162435.309262-1-arnd@arndb.de>

The migrate_pages system call has an assigned number on all architectures
except ARM. When it got added initially in commit d80ade7b3231 ("ARM:
Fix warning: #warning syscall migrate_pages not implemented"), it was
intentionally left out based on the observation that there are no 32-bit
ARM NUMA systems.

However, there are now arm64 NUMA machines that can in theory run 32-bit
kernels (actually enabling NUMA there would require additional work)
as well as 32-bit user space on 64-bit kernels, so that argument is no
longer very strong.

Assigning the number lets us use the system call on 64-bit kernels as well
as providing a more consistent set of syscalls across architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/arm/include/asm/unistd.h     | 1 -
 arch/arm/tools/syscall.tbl        | 1 +
 arch/arm64/include/asm/unistd.h   | 2 +-
 arch/arm64/include/asm/unistd32.h | 2 ++
 4 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h
index 88ef2ce1f69a..d713587dfcf4 100644
--- a/arch/arm/include/asm/unistd.h
+++ b/arch/arm/include/asm/unistd.h
@@ -45,7 +45,6 @@
  * Unimplemented (or alternatively implemented) syscalls
  */
 #define __IGNORE_fadvise64_64
-#define __IGNORE_migrate_pages
 
 #ifdef __ARM_EABI__
 /*
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index 8edf93b4490f..86de9eb34296 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -414,3 +414,4 @@
 397	common	statx			sys_statx
 398	common	rseq			sys_rseq
 399	common	io_pgetevents		sys_io_pgetevents
+400	common	migrate_pages		sys_migrate_pages
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index a7b1fc58ffdf..261216c3336e 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -44,7 +44,7 @@
 #define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)
 #define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls		400
+#define __NR_compat_syscalls		401
 #endif
 
 #define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 04ee190b90fe..355fe2bc035b 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -821,6 +821,8 @@ __SYSCALL(__NR_statx, sys_statx)
 __SYSCALL(__NR_rseq, sys_rseq)
 #define __NR_io_pgetevents 399
 __SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
+#define __NR_migrate_pages 400
+__SYSCALL(__NR_migrate_pages, sys_migrate_pages)
 
 /*
  * Please add new compat syscalls above this comment and update
-- 
2.20.0

_______________________________________________
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Y2038@lists.linaro.org
https://lists.linaro.org/mailman/listinfo/y2038

  parent reply	other threads:[~2019-01-10 16:24 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190110162435.309262-1-arnd@arndb.de>
2019-01-10 16:24 ` [PATCH 01/15] ia64: add __NR_umount2 definition Arnd Bergmann
2019-01-10 16:24 ` [PATCH 02/15] ia64: add statx and io_pgetevents syscalls Arnd Bergmann
2019-01-10 16:24 ` [PATCH 03/15] ia64: assign syscall numbers for perf and seccomp Arnd Bergmann
2019-01-10 16:24 ` Arnd Bergmann [this message]
2019-01-10 16:24 ` [PATCH 11/15] mips: fix n32 compat_ipc_parse_version Arnd Bergmann
2019-01-10 19:39   ` Paul Burton
2019-01-10 23:04     ` Arnd Bergmann
2019-01-11 19:25   ` Paul Burton
     [not found] ` <CAMuHMdXYP3=TRHYqddVRfbRRaj_Ou=wfoX6ohKM7XNAx-c2RXw@mail.gmail.com>
2019-01-10 17:06   ` [PATCH 00/15] arch: synchronize syscall tables in preparation for y2038 Arnd Bergmann
2019-01-10 18:11     ` Geert Uytterhoeven
     [not found]       ` <CAK8P3a07yNiadLCJcA0Tyfo90YeQ0P2XF-wOEy9XAb8cDTFObw@mail.gmail.com>
2019-01-11  8:07         ` Geert Uytterhoeven
2019-01-10 18:10 ` Joseph Myers
     [not found]   ` <CAK8P3a2f4SCJXrm6HWO9UKY-akSW+ONNpOvQOtYbia_fRo9ciQ@mail.gmail.com>
2019-01-10 23:14     ` Michael Cree
     [not found] ` <20190110162435.309262-15-arnd@arndb.de>
2019-01-14  3:40   ` [PATCH 14/15] arch: add split IPC system calls where needed Michael Ellerman
     [not found]   ` <87pnsz28k2.fsf@concordia.ellerman.id.au>
2019-01-15 15:01     ` Arnd Bergmann
     [not found]       ` <CAK8P3a3eUzGDrJtV2ySpgHwjKHwZYr+1xHp6tChCt1gWi=mJ+g@mail.gmail.com>
2019-01-15 16:35         ` Geert Uytterhoeven
2019-01-16  0:09         ` Michael Ellerman
2019-01-16  0:10       ` Michael Ellerman
     [not found] ` <20190110162435.309262-16-arnd@arndb.de>
     [not found]   ` <20190115115229.mcrmmpwdmjxf2cra@e5254000004ec.dyn.armlinux.org.uk>
2019-01-15 14:47     ` [PATCH 15/15] arch: add pkey and rseq syscall numbers everywhere Arnd Bergmann

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