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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-07-24 12:36:56 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-07-24 12:36:56 -0700 |
| commit | b9f12a5d97f652c77ef6803dccd0d40d1290f5be (patch) | |
| tree | 8f58c8620ffef0d350a5ec022feda492a96b179a /arch/arm/mm/alignment.c | |
| parent | 9d8dc3e529a19e427fd379118acd132520935c5d (diff) | |
| parent | 9a3c4145af32125c5ee39c0272662b47307a8323 (diff) | |
Merge tag 'v3.16-rc6' into next
Merge with mainline to bring in changes to MFD to allow merging
ipaq-micro-ts driver.
Diffstat (limited to 'arch/arm/mm/alignment.c')
| -rw-r--r-- | arch/arm/mm/alignment.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c index 924036473b1..b8cb1a2688a 100644 --- a/arch/arm/mm/alignment.c +++ b/arch/arm/mm/alignment.c @@ -28,6 +28,7 @@ #include <asm/opcodes.h> #include "fault.h" +#include "mm.h" /* * 32-bit misaligned trap handler (c) 1998 San Mehat (CCC) -July 1998 @@ -81,6 +82,7 @@ static unsigned long ai_word; static unsigned long ai_dword; static unsigned long ai_multi; static int ai_usermode; +static unsigned long cr_no_alignment; core_param(alignment, ai_usermode, int, 0600); @@ -91,7 +93,7 @@ core_param(alignment, ai_usermode, int, 0600); /* Return true if and only if the ARMv6 unaligned access model is in use. */ static bool cpu_is_v6_unaligned(void) { - return cpu_architecture() >= CPU_ARCH_ARMv6 && (cr_alignment & CR_U); + return cpu_architecture() >= CPU_ARCH_ARMv6 && get_cr() & CR_U; } static int safe_usermode(int new_usermode, bool warn) @@ -949,6 +951,13 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs) return 0; } +static int __init noalign_setup(char *__unused) +{ + set_cr(__clear_cr(CR_A)); + return 1; +} +__setup("noalign", noalign_setup); + /* * This needs to be done after sysctl_init, otherwise sys/ will be * overwritten. Actually, this shouldn't be in sys/ at all since @@ -966,14 +975,12 @@ static int __init alignment_init(void) return -ENOMEM; #endif -#ifdef CONFIG_CPU_CP15 if (cpu_is_v6_unaligned()) { - cr_alignment &= ~CR_A; - cr_no_alignment &= ~CR_A; - set_cr(cr_alignment); + set_cr(__clear_cr(CR_A)); ai_usermode = safe_usermode(ai_usermode, false); } -#endif + + cr_no_alignment = get_cr() & ~CR_A; hook_fault_code(FAULT_CODE_ALIGNMENT, do_alignment, SIGBUS, BUS_ADRALN, "alignment exception"); |