From 275f22148e8720e84b180d9e0cdf8abfd69bac5b Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 31 Dec 2018 22:22:40 +0100 Subject: ipc: rename old-style shmctl/semctl/msgctl syscalls The behavior of these system calls is slightly different between architectures, as determined by the CONFIG_ARCH_WANT_IPC_PARSE_VERSION symbol. Most architectures that implement the split IPC syscalls don't set that symbol and only get the modern version, but alpha, arm, microblaze, mips-n32, mips-n64 and xtensa expect the caller to pass the IPC_64 flag. For the architectures that so far only implement sys_ipc(), i.e. m68k, mips-o32, powerpc, s390, sh, sparc, and x86-32, we want the new behavior when adding the split syscalls, so we need to distinguish between the two groups of architectures. The method I picked for this distinction is to have a separate system call entry point: sys_old_*ctl() now uses ipc_parse_version, while sys_*ctl() does not. The system call tables of the five architectures are changed accordingly. As an additional benefit, we no longer need the configuration specific definition for ipc_parse_version(), it always does the same thing now, but simply won't get called on architectures with the modern interface. A small downside is that on architectures that do set ARCH_WANT_IPC_PARSE_VERSION, we now have an extra set of entry points that are never called. They only add a few bytes of bloat, so it seems better to keep them compared to adding yet another Kconfig symbol. I considered adding new syscall numbers for the IPC_64 variants for consistency, but decided against that for now. Signed-off-by: Arnd Bergmann --- arch/microblaze/kernel/syscalls/syscall.tbl | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/microblaze') diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl index a24d09e937dd..7cc0f9554da3 100644 --- a/arch/microblaze/kernel/syscalls/syscall.tbl +++ b/arch/microblaze/kernel/syscalls/syscall.tbl @@ -335,15 +335,15 @@ 325 common semtimedop sys_semtimedop 326 common timerfd_settime sys_timerfd_settime 327 common timerfd_gettime sys_timerfd_gettime -328 common semctl sys_semctl +328 common semctl sys_old_semctl 329 common semget sys_semget 330 common semop sys_semop -331 common msgctl sys_msgctl +331 common msgctl sys_old_msgctl 332 common msgget sys_msgget 333 common msgrcv sys_msgrcv 334 common msgsnd sys_msgsnd 335 common shmat sys_shmat -336 common shmctl sys_shmctl +336 common shmctl sys_old_shmctl 337 common shmdt sys_shmdt 338 common shmget sys_shmget 339 common signalfd4 sys_signalfd4 -- cgit v1.2.3