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/mips/kernel/syscalls/syscall_n32.tbl | 6 +++--- arch/mips/kernel/syscalls/syscall_n64.tbl | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl index 53d5862649ae..cc134b1211aa 100644 --- a/arch/mips/kernel/syscalls/syscall_n32.tbl +++ b/arch/mips/kernel/syscalls/syscall_n32.tbl @@ -37,7 +37,7 @@ 27 n32 madvise sys_madvise 28 n32 shmget sys_shmget 29 n32 shmat sys_shmat -30 n32 shmctl compat_sys_shmctl +30 n32 shmctl compat_sys_old_shmctl 31 n32 dup sys_dup 32 n32 dup2 sys_dup2 33 n32 pause sys_pause @@ -71,12 +71,12 @@ 61 n32 uname sys_newuname 62 n32 semget sys_semget 63 n32 semop sys_semop -64 n32 semctl compat_sys_semctl +64 n32 semctl compat_sys_old_semctl 65 n32 shmdt sys_shmdt 66 n32 msgget sys_msgget 67 n32 msgsnd compat_sys_msgsnd 68 n32 msgrcv compat_sys_msgrcv -69 n32 msgctl compat_sys_msgctl +69 n32 msgctl compat_sys_old_msgctl 70 n32 fcntl compat_sys_fcntl 71 n32 flock sys_flock 72 n32 fsync sys_fsync diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl index a8286ccbb66c..af0da757a7b2 100644 --- a/arch/mips/kernel/syscalls/syscall_n64.tbl +++ b/arch/mips/kernel/syscalls/syscall_n64.tbl @@ -37,7 +37,7 @@ 27 n64 madvise sys_madvise 28 n64 shmget sys_shmget 29 n64 shmat sys_shmat -30 n64 shmctl sys_shmctl +30 n64 shmctl sys_old_shmctl 31 n64 dup sys_dup 32 n64 dup2 sys_dup2 33 n64 pause sys_pause @@ -71,12 +71,12 @@ 61 n64 uname sys_newuname 62 n64 semget sys_semget 63 n64 semop sys_semop -64 n64 semctl sys_semctl +64 n64 semctl sys_old_semctl 65 n64 shmdt sys_shmdt 66 n64 msgget sys_msgget 67 n64 msgsnd sys_msgsnd 68 n64 msgrcv sys_msgrcv -69 n64 msgctl sys_msgctl +69 n64 msgctl sys_old_msgctl 70 n64 fcntl sys_fcntl 71 n64 flock sys_flock 72 n64 fsync sys_fsync -- cgit v1.2.3