diff options
| author | Mathieu Desnoyers <[email protected]> | 2018-06-02 08:43:57 -0400 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-06-06 11:58:31 +0200 |
| commit | 338035edc9b96cd63f4bc823db5f36c617c560bf (patch) | |
| tree | efd00526f86eaa2cef3164b2b901a60672452a5c | |
| parent | b74406f37737c91c5ede7c625d9d31482a8a4290 (diff) | |
arm: Wire up restartable sequences system call
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 <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Joel Fernandes <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dave Watson <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: "H . Peter Anvin" <[email protected]>
Cc: Chris Lameter <[email protected]>
Cc: Russell King <[email protected]>
Cc: Andrew Hunter <[email protected]>
Cc: Michael Kerrisk <[email protected]>
Cc: "Paul E . McKenney" <[email protected]>
Cc: Paul Turner <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Josh Triplett <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Ben Maurer <[email protected]>
Cc: [email protected]
Cc: Andy Lutomirski <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
| -rw-r--r-- | arch/arm/tools/syscall.tbl | 1 |
1 files changed, 1 insertions, 0 deletions
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 |