Commit-ID: 3ebfd81f7fb3e81a754e37283b7f38c62244641a Gitweb: http://git.kernel.org/tip/3ebfd81f7fb3e81a754e37283b7f38c62244641a Author: H.J. Lu <hjl.to...@gmail.com> AuthorDate: Thu, 14 Jul 2016 12:31:53 -0700 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 15 Jul 2016 10:30:26 +0200
x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2 Don't use the same syscall numbers for 2 different syscalls: 534 x32 preadv compat_sys_preadv64 535 x32 pwritev compat_sys_pwritev64 534 x32 preadv2 compat_sys_preadv2 535 x32 pwritev2 compat_sys_pwritev2 Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit offset is passed in one 64-bit register on x32, similar to compat_sys_preadv64() and compat_sys_pwritev64(). Signed-off-by: H.J. Lu <hjl.to...@gmail.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Christoph Hellwig <h...@lst.de> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Josh Poimboeuf <jpoim...@redhat.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/came9roovcmf-rqfx_n1u_tu_dx1bykjtfr%3dq4-_pfvsj9bc...@mail.gmail.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/entry/syscalls/syscall_64.tbl | 4 ++-- arch/x86/include/asm/unistd.h | 2 ++ fs/read_write.c | 18 ++++++++++++++++++ 3 files changed, 22 insertions(+), 2 deletions(-) diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 555263e..e9ce9c7 100644 --- a/arch/x86/entry/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl @@ -374,5 +374,5 @@ 543 x32 io_setup compat_sys_io_setup 544 x32 io_submit compat_sys_io_submit 545 x32 execveat compat_sys_execveat/ptregs -534 x32 preadv2 compat_sys_preadv2 -535 x32 pwritev2 compat_sys_pwritev2 +546 x32 preadv2 compat_sys_preadv64v2 +547 x32 pwritev2 compat_sys_pwritev64v2 diff --git a/arch/x86/include/asm/unistd.h b/arch/x86/include/asm/unistd.h index 2b19caa..32712a9 100644 --- a/arch/x86/include/asm/unistd.h +++ b/arch/x86/include/asm/unistd.h @@ -26,6 +26,8 @@ # define __ARCH_WANT_COMPAT_SYS_GETDENTS64 # define __ARCH_WANT_COMPAT_SYS_PREADV64 # define __ARCH_WANT_COMPAT_SYS_PWRITEV64 +# define __ARCH_WANT_COMPAT_SYS_PREADV64V2 +# define __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 # endif diff --git a/fs/read_write.c b/fs/read_write.c index 933b53a..66215a7 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1168,6 +1168,15 @@ COMPAT_SYSCALL_DEFINE5(preadv, compat_ulong_t, fd, return do_compat_preadv64(fd, vec, vlen, pos, 0); } +#ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2 +COMPAT_SYSCALL_DEFINE5(preadv64v2, unsigned long, fd, + const struct compat_iovec __user *,vec, + unsigned long, vlen, loff_t, pos, int, flags) +{ + return do_compat_preadv64(fd, vec, vlen, pos, flags); +} +#endif + COMPAT_SYSCALL_DEFINE6(preadv2, compat_ulong_t, fd, const struct compat_iovec __user *,vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high, @@ -1265,6 +1274,15 @@ COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd, return do_compat_pwritev64(fd, vec, vlen, pos, 0); } +#ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2 +COMPAT_SYSCALL_DEFINE5(pwritev64v2, unsigned long, fd, + const struct compat_iovec __user *,vec, + unsigned long, vlen, loff_t, pos, int, flags) +{ + return do_compat_pwritev64(fd, vec, vlen, pos, flags); +} +#endif + COMPAT_SYSCALL_DEFINE6(pwritev2, compat_ulong_t, fd, const struct compat_iovec __user *,vec, compat_ulong_t, vlen, u32, pos_low, u32, pos_high, int, flags)
