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authorArnd Bergmann <arnd@arndb.de>2018-12-31 22:22:40 +0100
committerArnd Bergmann <arnd@arndb.de>2019-01-25 17:22:50 +0100
commit275f22148e8720e84b180d9e0cdf8abfd69bac5b (patch)
treef7cb9810f8415904589d73a8d8f3c15b0bc70246 /arch/xtensa
parentsparc64: fix sparc_ipc type conversion (diff)
downloadlinux-dev-275f22148e8720e84b180d9e0cdf8abfd69bac5b.tar.xz
linux-dev-275f22148e8720e84b180d9e0cdf8abfd69bac5b.zip
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/xtensa')
-rw-r--r--arch/xtensa/kernel/syscalls/syscall.tbl6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 69cf91b03b26..f8befa11b0c4 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -103,7 +103,7 @@
91 common madvise sys_madvise
92 common shmget sys_shmget
93 common shmat xtensa_shmat
-94 common shmctl sys_shmctl
+94 common shmctl sys_old_shmctl
95 common shmdt sys_shmdt
# Socket Operations
96 common socket sys_socket
@@ -177,12 +177,12 @@
161 common semtimedop sys_semtimedop
162 common semget sys_semget
163 common semop sys_semop
-164 common semctl sys_semctl
+164 common semctl sys_old_semctl
165 common available165 sys_ni_syscall
166 common msgget sys_msgget
167 common msgsnd sys_msgsnd
168 common msgrcv sys_msgrcv
-169 common msgctl sys_msgctl
+169 common msgctl sys_old_msgctl
170 common available170 sys_ni_syscall
# File System
171 common umount2 sys_umount