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authorLinus Torvalds <torvalds@linux-foundation.org>2021-05-27 11:58:26 -1000
committerLinus Torvalds <torvalds@linux-foundation.org>2021-05-27 11:58:26 -1000
commit3c856a3180daf38d33166c0c98da921841588019 (patch)
tree2b044920d2220721f384a663c062bdd84dd071d3 /arch
parent38747c9a2d221ad899a1a861777ee79a11ab6e73 (diff)
parente69012400b0cb42b2070748322cb72f9effec00f (diff)
downloadlinux-3c856a3180daf38d33166c0c98da921841588019.tar.gz
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:

 - Don't use contiguous or block mappings for the linear map when KFENCE
   is enabled.

 - Fix link in the arch_counter_enforce_ordering() comment.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: mm: don't use CON and BLK mapping if KFENCE is enabled
  arm64: Fix stale link in the arch_counter_enforce_ordering() comment
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/barrier.h2
-rw-r--r--arch/arm64/mm/mmu.c3
2 files changed, 3 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 2175ec0004ed..451e11e5fd23 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -74,7 +74,7 @@ static inline unsigned long array_index_mask_nospec(unsigned long idx,
  * This insanity brought to you by speculative system register reads,
  * out-of-order memory accesses, sequence locks and Thomas Gleixner.
  *
- * http://lists.infradead.org/pipermail/linux-arm-kernel/2019-February/631195.html
+ * https://lore.kernel.org/r/alpine.DEB.2.21.1902081950260.1662@nanos.tec.linutronix.de/
  */
 #define arch_counter_enforce_ordering(val) do {				\
 	u64 tmp, _val = (val);						\
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 6dd9369e3ea0..89b66ef43a0f 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -515,7 +515,8 @@ static void __init map_mem(pgd_t *pgdp)
 	 */
 	BUILD_BUG_ON(pgd_index(direct_map_end - 1) == pgd_index(direct_map_end));
 
-	if (rodata_full || crash_mem_map || debug_pagealloc_enabled())
+	if (rodata_full || crash_mem_map || debug_pagealloc_enabled() ||
+	    IS_ENABLED(CONFIG_KFENCE))
 		flags |= NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
 
 	/*