Peter Zijlstra f2cb4f95b7 x86/kprobe: Add comments to arch_{,un}optimize_kprobes() ...

Add a few words describing how it is safe to overwrite the 4 bytes
after a kprobe. In specific it is possible the JMP.d32 required for
the optimized kprobe overwrites multiple instructions.

Tested-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20191111132458.401696663@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2019-11-27 07:44:25 +01:00

..

alpha

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

arc

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

arm

arm/ftrace: Use __patch_text()

2019-11-27 07:44:25 +01:00

arm64

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 16:02:40 -08:00

c6x

c6x: Move EXCEPTION_TABLE to RO_DATA segment

2019-11-04 18:10:58 +01:00

csky

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

2019-11-04 15:57:41 +01:00

h8300

h8300: Move EXCEPTION_TABLE to RO_DATA segment

2019-11-04 18:12:55 +01:00

hexagon

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

2019-11-04 15:57:41 +01:00

ia64

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 15:23:14 -08:00

m68k

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

microblaze

microblaze: Move EXCEPTION_TABLE to RO_DATA segment

2019-11-04 18:18:23 +01:00

mips

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

nds32

module: Remove set_all_modules_text_*()

2019-11-27 07:44:25 +01:00

nios2

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

2019-11-04 15:57:41 +01:00

openrisc

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

2019-11-04 15:57:41 +01:00

parisc

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

powerpc

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 15:23:14 -08:00

riscv

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

s390

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 16:02:40 -08:00

sh

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

sparc

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

um

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

unicore32

vmlinux.lds.h: Replace RW_DATA_SECTION with RW_DATA

2019-11-04 15:57:41 +01:00

x86

x86/kprobe: Add comments to arch_{,un}optimize_kprobes()

2019-11-27 07:44:25 +01:00

xtensa

Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-11-26 10:42:40 -08:00

.gitignore

…

Kconfig

locking/refcount: Consolidate implementations of refcount_t

2019-11-25 09:15:32 +01:00