Commit 1b4757ee authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 

Pull ARM fixes from Russell King:
 "This round of fixes is smaller than previous: a couple more updates
  for the security fixes, and a one-liner kexec fix"

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
  ARM: 7816/1: CONFIG_KUSER_HELPERS: fix help text
  ARM: 7815/1: kexec: offline non panic CPUs on Kdump panic
  ARM: 7819/1: fiq: Cast the first argument of flush_icache_range()
parents 4d4323ea e1f02037

arch/arm/kernel/fiq.c

+2 −1
Original line number Diff line number Diff line
@@ -89,7 +89,8 @@ void set_fiq_handler(void *start, unsigned int length) 


	memcpy(base + offset, start, length);

	if (!cache_is_vipt_nonaliasing())

		flush_icache_range(base + offset, offset + length);

		flush_icache_range((unsigned long)base + offset, offset +

				   length);

	flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length);

}

arch/arm/kernel/machine_kexec.c

+1 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ void machine_crash_nonpanic_core(void *unused) 
	crash_save_cpu(&regs, smp_processor_id());

	flush_cache_all();



	set_cpu_online(smp_processor_id(), false);

	atomic_dec(&waiting_for_crash_ipi);

	while (1)

		cpu_relax();

arch/arm/mm/Kconfig

+6 −3
Original line number Diff line number Diff line
@@ -809,15 +809,18 @@ config KUSER_HELPERS 
	  the CPU type fitted to the system.  This permits binaries to be

	  run on ARMv4 through to ARMv7 without modification.



	  See Documentation/arm/kernel_user_helpers.txt for details.



	  However, the fixed address nature of these helpers can be used

	  by ROP (return orientated programming) authors when creating

	  exploits.



	  If all of the binaries and libraries which run on your platform

	  are built specifically for your platform, and make no use of

	  these helpers, then you can turn this option off.  However,

	  when such an binary or library is run, it will receive a SIGILL

	  signal, which will terminate the program.

	  these helpers, then you can turn this option off to hinder

	  such exploits. However, in that case, if a binary or library

	  relying on those helpers is run, it will receive a SIGILL signal,

	  which will terminate the program.



	  Say N here only if you are absolutely certain that you do not

	  need these helpers; otherwise, the safe option is to say Y.

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