arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
authorAlexander Potapenko <glider@google.com>
Fri, 25 Mar 2016 21:22:05 +0000 (14:22 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 25 Mar 2016 23:37:42 +0000 (16:37 -0700)
commitbe7635e7287e0e8013af3c89a6354a9e0182594c
tree2c88dacfaa9d9b6a0479264c871142cf80e480de
parent505f5dcb1c419e55a9621a01f83eb5745d8d7398
arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.

Move the definition of __irq_entry to <linux/interrupt.h> so that the
users don't need to pull in <linux/ftrace.h>.  Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.

Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
23 files changed:
arch/arm/include/asm/exception.h
arch/arm/kernel/vmlinux.lds.S
arch/arm64/include/asm/exception.h
arch/arm64/kernel/vmlinux.lds.S
arch/blackfin/kernel/vmlinux.lds.S
arch/c6x/kernel/vmlinux.lds.S
arch/metag/kernel/vmlinux.lds.S
arch/microblaze/kernel/vmlinux.lds.S
arch/mips/kernel/vmlinux.lds.S
arch/nios2/kernel/vmlinux.lds.S
arch/openrisc/kernel/vmlinux.lds.S
arch/parisc/kernel/vmlinux.lds.S
arch/powerpc/kernel/vmlinux.lds.S
arch/s390/kernel/vmlinux.lds.S
arch/sh/kernel/vmlinux.lds.S
arch/sparc/kernel/vmlinux.lds.S
arch/tile/kernel/vmlinux.lds.S
arch/x86/kernel/vmlinux.lds.S
include/asm-generic/vmlinux.lds.h
include/linux/ftrace.h
include/linux/interrupt.h
kernel/softirq.c
kernel/trace/trace_functions_graph.c