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authorArnd Bergmann <arnd@arndb.de>2019-01-01 00:22:40 +0300
committerArnd Bergmann <arnd@arndb.de>2019-01-25 19:22:50 +0300
commit275f22148e8720e84b180d9e0cdf8abfd69bac5b (patch)
treef7cb9810f8415904589d73a8d8f3c15b0bc70246 /arch/arm64/include/asm/unistd32.h
parent73a66023c937ef258f2aa340cdb53ae7d8b1d47c (diff)
downloadlinux-275f22148e8720e84b180d9e0cdf8abfd69bac5b.tar.xz
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 <arnd@arndb.de>
Diffstat (limited to 'arch/arm64/include/asm/unistd32.h')
-rw-r--r--arch/arm64/include/asm/unistd32.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 8ca1d4c304f4..d10cce69a4b0 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -622,7 +622,7 @@ __SYSCALL(__NR_semop, sys_semop)
#define __NR_semget 299
__SYSCALL(__NR_semget, sys_semget)
#define __NR_semctl 300
-__SYSCALL(__NR_semctl, compat_sys_semctl)
+__SYSCALL(__NR_semctl, compat_sys_old_semctl)
#define __NR_msgsnd 301
__SYSCALL(__NR_msgsnd, compat_sys_msgsnd)
#define __NR_msgrcv 302
@@ -630,7 +630,7 @@ __SYSCALL(__NR_msgrcv, compat_sys_msgrcv)
#define __NR_msgget 303
__SYSCALL(__NR_msgget, sys_msgget)
#define __NR_msgctl 304
-__SYSCALL(__NR_msgctl, compat_sys_msgctl)
+__SYSCALL(__NR_msgctl, compat_sys_old_msgctl)
#define __NR_shmat 305
__SYSCALL(__NR_shmat, compat_sys_shmat)
#define __NR_shmdt 306
@@ -638,7 +638,7 @@ __SYSCALL(__NR_shmdt, sys_shmdt)
#define __NR_shmget 307
__SYSCALL(__NR_shmget, sys_shmget)
#define __NR_shmctl 308
-__SYSCALL(__NR_shmctl, compat_sys_shmctl)
+__SYSCALL(__NR_shmctl, compat_sys_old_shmctl)
#define __NR_add_key 309
__SYSCALL(__NR_add_key, sys_add_key)
#define __NR_request_key 310