[PATCH] Add support for the sys_vmsplice syscall
sys_splice() moves data to/from pipes with a file input/output. sys_vmsplice()
moves data to a pipe, with the input being a user address range instead.
This uses an approach suggested by Linus, where we can hold partial ranges
inside the pages[] map. Hopefully this will be useful for network
receive support as well.
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index e307988..bcb80ca 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1610,5 +1610,6 @@
data8 sys_get_robust_list
data8 sys_sync_file_range // 1300
data8 sys_tee
+ data8 sys_vmsplice
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S
index 8d15226..0b98eea 100644
--- a/arch/powerpc/kernel/systbl.S
+++ b/arch/powerpc/kernel/systbl.S
@@ -324,6 +324,7 @@
SYSCALL(unshare)
SYSCALL(splice)
SYSCALL(tee)
+SYSCALL(vmsplice)
/*
* please add new calls to arch/powerpc/platforms/cell/spu_callbacks.c
diff --git a/arch/powerpc/platforms/cell/spu_callbacks.c b/arch/powerpc/platforms/cell/spu_callbacks.c
index deb3afb..b283380 100644
--- a/arch/powerpc/platforms/cell/spu_callbacks.c
+++ b/arch/powerpc/platforms/cell/spu_callbacks.c
@@ -318,6 +318,7 @@
[__NR_unshare] sys_unshare,
[__NR_splice] sys_splice,
[__NR_tee] sys_tee,
+ [__NR_vmsplice] sys_vmsplice,
};
long spu_sys_callback(struct spu_syscall_block *s)
