Wire up the thread-local ABI system call on 32-bit ARM. This provides an ABI improving the speed of a getcpu operation on ARM by skipping the getcpu system call on the fast path. The thread-local ABI can be extended to add features in the future. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> CC: Russell King <linux@xxxxxxxxxxxxxxxx> CC: Catalin Marinas <catalin.marinas@xxxxxxx> CC: Will Deacon <will.deacon@xxxxxxx> CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CC: Paul Turner <pjt@xxxxxxxxxx> CC: Andrew Hunter <ahh@xxxxxxxxxx> CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CC: Andy Lutomirski <luto@xxxxxxxxxxxxxx> CC: Andi Kleen <andi@xxxxxxxxxxxxxx> CC: Dave Watson <davejwatson@xxxxxx> CC: Chris Lameter <cl@xxxxxxxxx> CC: Ingo Molnar <mingo@xxxxxxxxxx> CC: Ben Maurer <bmaurer@xxxxxx> CC: Steven Rostedt <rostedt@xxxxxxxxxxx> CC: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> CC: Josh Triplett <josh@xxxxxxxxxxxxxxxx> CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> CC: Boqun Feng <boqun.feng@xxxxxxxxx> CC: linux-api@xxxxxxxxxxxxxxx --- arch/arm/include/asm/unistd.h | 2 +- arch/arm/include/uapi/asm/unistd.h | 1 + arch/arm/kernel/calls.S | 3 ++- 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/unistd.h b/arch/arm/include/asm/unistd.h index 7b84657..194b699 100644 --- a/arch/arm/include/asm/unistd.h +++ b/arch/arm/include/asm/unistd.h @@ -19,7 +19,7 @@ * This may need to be greater than __NR_last_syscall+1 in order to * account for the padding in the syscall table */ -#define __NR_syscalls (392) +#define __NR_syscalls (396) #define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_GETHOSTNAME diff --git a/arch/arm/include/uapi/asm/unistd.h b/arch/arm/include/uapi/asm/unistd.h index 5dd2528..aaa9221 100644 --- a/arch/arm/include/uapi/asm/unistd.h +++ b/arch/arm/include/uapi/asm/unistd.h @@ -418,6 +418,7 @@ #define __NR_membarrier (__NR_SYSCALL_BASE+389) #define __NR_mlock2 (__NR_SYSCALL_BASE+390) #define __NR_copy_file_range (__NR_SYSCALL_BASE+391) +#define __NR_thread_local_abi (__NR_SYSCALL_BASE+392) /* * The following SWIs are ARM private. diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index dfc7cd6..d6a0fe9 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -399,8 +399,9 @@ CALL(sys_execveat) CALL(sys_userfaultfd) CALL(sys_membarrier) - CALL(sys_mlock2) +/* 390 */ CALL(sys_mlock2) CALL(sys_copy_file_range) + CALL(sys_thread_local_abi) #ifndef syscalls_counted .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls #define syscalls_counted -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
