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