Wire up the rseq system call on 32-bit ARM. This provides an ABI improving the speed of a user-space getcpu operation on ARM by skipping the getcpu system call on the fast path, as well as improving the speed of user-space operations on per-cpu data compared to using load-linked/store-conditional.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoy...@efficios.com> CC: Russell King <li...@arm.linux.org.uk> CC: Catalin Marinas <catalin.mari...@arm.com> CC: Will Deacon <will.dea...@arm.com> CC: Thomas Gleixner <t...@linutronix.de> CC: Paul Turner <p...@google.com> CC: Andrew Hunter <a...@google.com> CC: Peter Zijlstra <pet...@infradead.org> CC: Andy Lutomirski <l...@amacapital.net> CC: Andi Kleen <a...@firstfloor.org> CC: Dave Watson <davejwat...@fb.com> CC: Chris Lameter <c...@linux.com> CC: Ingo Molnar <mi...@redhat.com> CC: Ben Maurer <bmau...@fb.com> CC: Steven Rostedt <rost...@goodmis.org> CC: "Paul E. McKenney" <paul...@linux.vnet.ibm.com> CC: Josh Triplett <j...@joshtriplett.org> CC: Linus Torvalds <torva...@linux-foundation.org> CC: Andrew Morton <a...@linux-foundation.org> CC: Boqun Feng <boqun.f...@gmail.com> CC: linux-...@vger.kernel.org --- arch/arm/tools/syscall.tbl | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl index 0bb0e9c6376c..fbc74b5fa3ed 100644 --- a/arch/arm/tools/syscall.tbl +++ b/arch/arm/tools/syscall.tbl @@ -412,3 +412,4 @@ 395 common pkey_alloc sys_pkey_alloc 396 common pkey_free sys_pkey_free 397 common statx sys_statx +398 common rseq sys_rseq -- 2.11.0
