[PATCH v2 07/29] ARM: add kexec_file_load system call number

Arnd Bergmann
2019-01-18T16:18:13Z

A couple of architectures including arm64 already implement the
kexec_file_load system call, on many others we have assigned a system
call number for it, but not implemented it yet.

Adding the number in arch/arm/ lets us use the system call on arm64
systems in compat mode, and also reduces the number of differences
between architectures. If we want to implement kexec_file_load on ARM
in the future, the number assignment means that kexec tools can already
be built with the now current set of kernel headers.

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

diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index 86de9eb34296..20ed7e026723 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -415,3 +415,4 @@
398 common rseq sys_rseq
399 common io_pgetevents sys_io_pgetevents
400 common migrate_pages sys_migrate_pages
+401 common kexec_file_load sys_kexec_file_load
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 261216c3336e..2c30e6f145ff 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 401
+#define __NR_compat_syscalls 402
#endif

#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index f15bcbacb8f6..8ca1d4c304f4 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -823,6 +823,8 @@ __SYSCALL(__NR_rseq, sys_rseq)
__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
#define __NR_migrate_pages 400
__SYSCALL(__NR_migrate_pages, compat_sys_migrate_pages)
+#define __NR_kexec_file_load 401
+__SYSCALL(__NR_kexec_file_load, sys_kexec_file_load)

/*
* Please add new compat syscalls above this comment and update
--
2.20.0