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| author | Mike Frysinger <vapier@gentoo.org> | 2014-05-05 04:43:15 +0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2014-05-05 04:49:22 +0400 |
| commit | 7fd44dacdd803c0bbf38bf478d51d280902bb0f1 (patch) | |
| tree | fd0dc1133936b7ad2240e4dd60a959cc12530ebc /arch/x86/syscalls | |
| parent | d1db0eea852497762cab43b905b879dfcd3b8987 (diff) | |
| download | linux-7fd44dacdd803c0bbf38bf478d51d280902bb0f1.tar.xz | |
x86, x32: Use compat shims for io_{setup,submit}
The io_setup takes a pointer to a context id of type aio_context_t.
This in turn is typed to a __kernel_ulong_t. We could tweak the
exported headers to define this as a 64bit quantity for specific
ABIs, but since we already have a 32bit compat shim for the x86 ABI,
let's just re-use that logic. The libaio package is also written to
expect this as a pointer type, so a compat shim would simplify that.
The io_submit func operates on an array of pointers to iocb structs.
Padding out the array to be 64bit aligned is a huge pain, so convert
it over to the existing compat shim too.
We don't convert io_getevents to the compat func as its only purpose
is to handle the timespec struct, and the x32 ABI uses 64bit times.
With this change, the libaio package can now pass its testsuite when
built for the x32 ABI.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Link: http://lkml.kernel.org/r/1399250595-5005-1-git-send-email-vapier@gentoo.org
Cc: H.J. Lu <hjl.tools@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org> # v3.4+
Diffstat (limited to 'arch/x86/syscalls')
| -rw-r--r-- | arch/x86/syscalls/syscall_64.tbl | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/syscalls/syscall_64.tbl index 04376ac3d9ef..ec255a1646d2 100644 --- a/arch/x86/syscalls/syscall_64.tbl +++ b/arch/x86/syscalls/syscall_64.tbl @@ -212,10 +212,10 @@ 203 common sched_setaffinity sys_sched_setaffinity 204 common sched_getaffinity sys_sched_getaffinity 205 64 set_thread_area -206 common io_setup sys_io_setup +206 64 io_setup sys_io_setup 207 common io_destroy sys_io_destroy 208 common io_getevents sys_io_getevents -209 common io_submit sys_io_submit +209 64 io_submit sys_io_submit 210 common io_cancel sys_io_cancel 211 64 get_thread_area 212 common lookup_dcookie sys_lookup_dcookie @@ -359,3 +359,5 @@ 540 x32 process_vm_writev compat_sys_process_vm_writev 541 x32 setsockopt compat_sys_setsockopt 542 x32 getsockopt compat_sys_getsockopt +543 x32 io_setup compat_sys_io_setup +544 x32 io_submit compat_sys_io_submit |