OpenWrt – Blame information for rev 4

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4 office 1 From: Wolfram Joost <dbox2@frokaschwei.de>
2 Subject: [PATCH] fork_cacheflush
3  
4 On ASUS WL-500gP there are many unexpected "Segmentation fault"s that
5 seem to be caused by a kernel. They can be avoided by:
6 1) Disabling highpage
7 2) Using flush_cache_mm in flush_cache_dup_mm
8  
9 For details see OpenWrt ticket #2035 https://dev.openwrt.org/ticket/2035
10 ---
11 --- a/arch/mips/include/asm/cacheflush.h
12 +++ b/arch/mips/include/asm/cacheflush.h
13 @@ -47,7 +47,7 @@
14 extern void (*flush_cache_all)(void);
15 extern void (*__flush_cache_all)(void);
16 extern void (*flush_cache_mm)(struct mm_struct *mm);
17 -#define flush_cache_dup_mm(mm) do { (void) (mm); } while (0)
18 +#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
19 extern void (*flush_cache_range)(struct vm_area_struct *vma,
20 unsigned long start, unsigned long end);
21 extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);