diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-07 10:17:56 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-07 10:17:56 +0200 |
| commit | f1615bbe9be4def59c3b3eaddb60722efeed16c2 (patch) | |
| tree | ca3020e65447576fc1826e819651e6ba072030b5 /arch/arm/mm/alignment.c | |
| parent | cfb3c0ab0903abb6ea5215b37eebd9c2a1f057eb (diff) | |
| parent | cd3de83f147601356395b57a8673e9c5ff1e59d1 (diff) | |
Merge tag 'v3.16-rc4' into drm-intel-next-queued
Due to Dave's vacation drm-next hasn't opened yet for 3.17 so I
couldn't move my drm-intel-next queue forward yet like I usually do.
Just pull in the latest upstream -rc to unblock patch merging - I
don't want to needlessly rebase my current patch pile really and void
all the testing we've done already.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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"); |