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| 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/Kconfig | |
| parent | af5395c214c15c18de3decf2229373a8c88c4fde (diff) | |
| download | linux-64711f9a47d4defa90417f5e8db8ed0060bc3275.tar.gz linux-64711f9a47d4defa90417f5e8db8ed0060bc3275.tar.bz2 linux-64711f9a47d4defa90417f5e8db8ed0060bc3275.zip | |
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/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 5a27a6fd3a1c..92eb80140e7f 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -17,6 +17,7 @@ config XTENSA select GENERIC_PCI_IOMAP select GENERIC_SCHED_CLOCK select GENERIC_STRNCPY_FROM_USER if KASAN + select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KASAN if MMU select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_KMEMLEAK |