diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2018-12-19 19:48:37 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2018-12-20 14:44:38 -0800 |
| commit | 64711f9a47d4defa90417f5e8db8ed0060bc3275 (patch) | |
| tree | 78a9fbb468c6b667ea99b57e6563689792b285d3 /arch/xtensa/kernel/Makefile | |
| parent | af5395c214c15c18de3decf2229373a8c88c4fde (diff) | |
xtensa: implement jump_label support
Use 3-byte 'nop' and 'j' instructions that are always present. Don't let
assembler mark a spot right after patchable 'j' instruction as
unreachable and later put literals or padding bytes there. Add separate
implementations of patch_text for SMP and UP cases, avoiding use of
atomics on UP.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel/Makefile')
| -rw-r--r-- | arch/xtensa/kernel/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/Makefile b/arch/xtensa/kernel/Makefile index 8dff506caf07..6f629027ac7d 100644 --- a/arch/xtensa/kernel/Makefile +++ b/arch/xtensa/kernel/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_SMP) += smp.o mxhead.o obj-$(CONFIG_XTENSA_VARIANT_HAVE_PERF_EVENTS) += perf_event.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o obj-$(CONFIG_S32C1I_SELFTEST) += s32c1i_selftest.o +obj-$(CONFIG_JUMP_LABEL) += jump_label.o # In the Xtensa architecture, assembly generates literals which must always # precede the L32R instruction with a relative offset less than 256 kB. |