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- 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);
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