Catalin Marinas 1417a6b8dc ARM: 8036/1: Enable IRQs before attempting to read user space in __und_usr ... The Undef abort handler in the kernel reads the undefined instruction from user space. If the page table was modified from another CPU, the user access could fail and do_page_fault() will be executed with interrupts disabled. This can potentially deadlock on ARM11MPCore or on Cortex-A15 with erratum 798181 workaround enabled (both implying IPI for TLB maintenance with page table lock held). This patch enables the IRQs in __und_usr before attempting to read the instruction from user space. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Arun KS <getarunks@gmail.com> Cc: Hartley Sweeten <hsweeten@visionengravers.com> Cc: Ryan Mallon <rmallon@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2014-04-25 12:06:38 +01:00
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entry.S	ARM: 8036/1: Enable IRQs before attempting to read user space in __und_usr	2014-04-25 12:06:38 +01:00
Makefile	ARM: vfp: use -mfloat-abi=soft to build vfp	2011-10-01 21:08:55 +02:00
vfp.h	[ARM] 5387/1: Add ptrace VFP support on ARM	2009-02-12 10:59:43 +00:00
vfpdouble.c	[ARM] vfp: fix fuitod/fsitod instructions	2008-01-10 17:07:08 +00:00
vfphw.S	ARM: 8018/1: Add {inc,dec}_preempt_count asm macros	2014-04-09 13:08:08 +01:00
vfpinstr.h	[ARM] 4583/1: ARMv7: Add VFPv3 support	2008-01-26 14:41:28 +00:00
vfpmodule.c	ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu	2013-10-30 22:10:10 +00:00
vfpsingle.c	[ARM] Remove unnecessary asm/ptrace.h from VFP support code	2007-04-22 10:56:40 +01:00