diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-01-01 00:22:40 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-01-25 19:22:50 +0300 |
| commit | 275f22148e8720e84b180d9e0cdf8abfd69bac5b (patch) | |
| tree | f7cb9810f8415904589d73a8d8f3c15b0bc70246 /arch/arm64/include/asm/unistd32.h | |
| parent | 73a66023c937ef258f2aa340cdb53ae7d8b1d47c (diff) | |
| download | linux-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.h | 6 |
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 |