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authorLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 17:09:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 17:09:14 -0700
commita24e3d414e59ac76566dedcad1ed1d319a93ec14 (patch)
treea14aedc216dd4eb1633c7510b4b5dc2c61cc936b /arch/x86/boot/Makefile
parentb91d9c6716319dcd9e6ffcfc9defaf79e705daab (diff)
parent8fe9752ef10343a8edb603cb93abc2bfae34e748 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge third patch-bomb from Andrew Morton: - more ocfs2 changes - a few hotfixes - Andy's compat cleanups - misc fixes to fatfs, ptrace, coredump, cpumask, creds, eventfd, panic, ipmi, kgdb, profile, kfifo, ubsan, etc. - many rapidio updates: fixes, new drivers. - kcov: kernel code coverage feature. Like gcov, but not "prohibitively expensive". - extable code consolidation for various archs * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (81 commits) ia64/extable: use generic search and sort routines x86/extable: use generic search and sort routines s390/extable: use generic search and sort routines alpha/extable: use generic search and sort routines kernel/...: convert pr_warning to pr_warn drivers: dma-coherent: use memset_io for DMA_MEMORY_IO mappings drivers: dma-coherent: use MEMREMAP_WC for DMA_MEMORY_MAP memremap: add MEMREMAP_WC flag memremap: don't modify flags kernel/signal.c: add compile-time check for __ARCH_SI_PREAMBLE_SIZE mm/mprotect.c: don't imply PROT_EXEC on non-exec fs ipc/sem: make semctl setting sempid consistent ubsan: fix tree-wide -Wmaybe-uninitialized false positives kfifo: fix sparse complaints scripts/gdb: account for changes in module data structure scripts/gdb: add cmdline reader command scripts/gdb: add version command kernel: add kcov code coverage profile: hide unused functions when !CONFIG_PROC_FS hpwdt: use nmi_panic() when kernel panics in NMI handler ...
Diffstat (limited to 'arch/x86/boot/Makefile')
-rw-r--r--arch/x86/boot/Makefile7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 0bf6749522d9..b1ef9e489084 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -12,6 +12,13 @@
KASAN_SANITIZE := n
OBJECT_FILES_NON_STANDARD := y
+# Kernel does not boot with kcov instrumentation here.
+# One of the problems observed was insertion of __sanitizer_cov_trace_pc()
+# callback into middle of per-cpu data enabling code. Thus the callback observed
+# inconsistent state and crashed. We are interested mostly in syscall coverage,
+# so boot code is not interesting anyway.
+KCOV_INSTRUMENT := n
+
# If you want to preset the SVGA mode, uncomment the next line and
# set SVGA_MODE to whatever number you want.
# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.