| From: Wolfram Joost <dbox2@frokaschwei.de> |
| Subject: [PATCH] fork_cacheflush |
| |
| On ASUS WL-500gP there are many unexpected "Segmentation fault"s that |
| seem to be caused by a kernel. They can be avoided by: |
| 1) Disabling highpage |
| 2) Using flush_cache_mm in flush_cache_dup_mm |
| |
| For details see OpenWrt ticket #2035 https://dev.openwrt.org/ticket/2035 |
| --- |
| --- a/arch/mips/include/asm/cacheflush.h |
| +++ b/arch/mips/include/asm/cacheflush.h |
| @@ -46,7 +46,7 @@ |
| extern void (*flush_cache_all)(void); |
| extern void (*__flush_cache_all)(void); |
| extern void (*flush_cache_mm)(struct mm_struct *mm); |
| -#define flush_cache_dup_mm(mm) do { (void) (mm); } while (0) |
| +#define flush_cache_dup_mm(mm) flush_cache_mm(mm) |
| extern void (*flush_cache_range)(struct vm_area_struct *vma, |
| unsigned long start, unsigned long end); |
| extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn); |