diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2018-12-31 22:22:40 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2019-01-25 17:22:50 +0100 |
| commit | 275f22148e8720e84b180d9e0cdf8abfd69bac5b (patch) | |
| tree | f7cb9810f8415904589d73a8d8f3c15b0bc70246 /arch/mips/kernel/syscalls | |
| parent | 73a66023c937ef258f2aa340cdb53ae7d8b1d47c (diff) | |
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/mips/kernel/syscalls')
| -rw-r--r-- | arch/mips/kernel/syscalls/syscall_n32.tbl | 6 | ||||
| -rw-r--r-- | arch/mips/kernel/syscalls/syscall_n64.tbl | 6 |
2 files changed, 6 insertions, 6 deletions
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 |