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| author | Felix Fietkau <nbd@openwrt.org> | 2007-10-13 10:02:27 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2007-10-13 10:02:27 +0000 |
| commit | d8667f49ce13db368487cf070a45292577616848 (patch) | |
| tree | adef17c3dda464dc0fea63aa6d2d60df9fee15d0 /target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch | |
| parent | e72303ebe3e62c00d16bb4d508bf5f99d6613b96 (diff) | |
| download | master-187ad058-d8667f49ce13db368487cf070a45292577616848.tar.gz master-187ad058-d8667f49ce13db368487cf070a45292577616848.tar.bz2 master-187ad058-d8667f49ce13db368487cf070a45292577616848.zip | |
Finally fix the annoying BCM4704 segfault issues (#2035) - tested with WL-500gP
Thanks to jhansen and Wolfram Joost for the fixes and to ryd for the test hardware.
Seems like the user space segfaults actually came from this patch: http://lkml.org/lkml/2006/12/12/158
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9285 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch b/target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch new file mode 100644 index 0000000000..16e7e3f36c --- /dev/null +++ b/target/linux/brcm47xx/patches-2.6.23/310-no_highpage.patch @@ -0,0 +1,71 @@ +Index: linux-2.6.23/arch/mips/mm/init.c +=================================================================== +--- linux-2.6.23.orig/arch/mips/mm/init.c 2007-10-13 11:46:58.762489429 +0200 ++++ linux-2.6.23/arch/mips/mm/init.c 2007-10-13 11:47:36.092616749 +0200 +@@ -205,31 +205,6 @@ + preempt_check_resched(); + } + +-void copy_user_highpage(struct page *to, struct page *from, +- unsigned long vaddr, struct vm_area_struct *vma) +-{ +- void *vfrom, *vto; +- +- vto = kmap_atomic(to, KM_USER1); +- if (cpu_has_dc_aliases && cpu_use_kmap_coherent && !Page_dcache_dirty(from)) { +- vfrom = kmap_coherent(from, vaddr); +- copy_page(vto, vfrom); +- kunmap_coherent(); +- } else { +- vfrom = kmap_atomic(from, KM_USER0); +- copy_page(vto, vfrom); +- kunmap_atomic(vfrom, KM_USER0); +- } +- if (((vma->vm_flags & VM_EXEC) && !cpu_has_ic_fills_f_dc) || +- pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK)) +- flush_data_cache_page((unsigned long)vto); +- kunmap_atomic(vto, KM_USER1); +- /* Make sure this page is cleared on other CPU's too before using it */ +- smp_wmb(); +-} +- +-EXPORT_SYMBOL(copy_user_highpage); +- + void copy_to_user_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr, void *dst, const void *src, + unsigned long len) +Index: linux-2.6.23/include/asm-mips/page.h +=================================================================== +--- linux-2.6.23.orig/include/asm-mips/page.h 2007-10-13 11:45:50.518600430 +0200 ++++ linux-2.6.23/include/asm-mips/page.h 2007-10-13 11:47:26.472068504 +0200 +@@ -35,6 +35,7 @@ + #ifndef __ASSEMBLY__ + + #include <linux/pfn.h> ++#include <asm/cpu-features.h> + #include <asm/io.h> + + /* +@@ -67,13 +68,16 @@ + flush_data_cache_page((unsigned long)addr); + } + +-extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, +- struct page *to); +-struct vm_area_struct; +-extern void copy_user_highpage(struct page *to, struct page *from, +- unsigned long vaddr, struct vm_area_struct *vma); ++static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, ++ struct page *to) ++{ ++ extern void (*flush_data_cache_page)(unsigned long addr); + +-#define __HAVE_ARCH_COPY_USER_HIGHPAGE ++ copy_page(vto, vfrom); ++ if (!cpu_has_ic_fills_f_dc || ++ pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK)) ++ flush_data_cache_page((unsigned long)vto); ++} + + /* + * These are used to make use of C type-checking.. |