diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2013-05-25 14:04:25 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-05-25 14:15:55 +0530 |
| commit | 7bb66f6e6eecdd8e10ed3a63bd28c1e9105adc79 (patch) | |
| tree | 091ca0ef40c1f116b9b2da09148cb1f09158be2f /arch/arc/include | |
| parent | 006dfb3c9c44192f06093d65b3a876fa5ad1319a (diff) | |
| download | blackbird-op-linux-7bb66f6e6eecdd8e10ed3a63bd28c1e9105adc79.tar.gz blackbird-op-linux-7bb66f6e6eecdd8e10ed3a63bd28c1e9105adc79.zip | |
ARC: lazy dcache flush broke gdb in non-aliasing configs
gdbserver inserting a breakpoint ends up calling copy_user_page() for a
code page. The generic version of which (non-aliasing config) didn't set
the PG_arch_1 bit hence update_mmu_cache() didn't sync dcache/icache for
corresponding dynamic loader code page - causing garbade to be executed.
So now aliasing versions of copy_user_highpage()/clear_page() are made
default. There is no significant overhead since all of special alias
handling code is compiled out for non-aliasing build
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include')
| -rw-r--r-- | arch/arc/include/asm/page.h | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h index 374a35514116..ab84bf131fe1 100644 --- a/arch/arc/include/asm/page.h +++ b/arch/arc/include/asm/page.h @@ -19,13 +19,6 @@ #define clear_page(paddr) memset((paddr), 0, PAGE_SIZE) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) -#ifndef CONFIG_ARC_CACHE_VIPT_ALIASING - -#define clear_user_page(addr, vaddr, pg) clear_page(addr) -#define copy_user_page(vto, vfrom, vaddr, pg) copy_page(vto, vfrom) - -#else /* VIPT aliasing dcache */ - struct vm_area_struct; struct page; @@ -35,8 +28,6 @@ void copy_user_highpage(struct page *to, struct page *from, unsigned long u_vaddr, struct vm_area_struct *vma); void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); -#endif /* CONFIG_ARC_CACHE_VIPT_ALIASING */ - #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS |
