kernel: replace the brcm47xx fuse workaround patches with a generic patch that applies to all mips targets

The dcache bug that it works around is a generic issue, not a brcm47xx cache quirk

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32395 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 32 insertions, 74 deletions

diff --git a/target/linux/brcm47xx/patches-3.3/301-kmod-fuse-dcache-bug-r4k.patch b/target/linux/brcm47xx/patches-3.3/301-kmod-fuse-dcache-bug-r4k.patch
deleted file mode 100644
index 27cd2a7449..0000000000
--- a/target/linux/brcm47xx/patches-3.3/301-kmod-fuse-dcache-bug-r4k.patch
+++ /dev/null
@@ -1,28 +0,0 @@
---- a/arch/mips/mm/c-r4k.c
-+++ b/arch/mips/mm/c-r4k.c
-@@ -373,7 +373,7 @@ static inline void local_r4k___flush_cac
- 	}
- }
- 
--static void r4k___flush_cache_all(void)
-+void r4k___flush_cache_all(void)
- {
- 	r4k_on_each_cpu(local_r4k___flush_cache_all, NULL);
- }
-@@ -537,7 +537,7 @@ static inline void local_r4k_flush_cache
- 	}
- }
- 
--static void r4k_flush_cache_page(struct vm_area_struct *vma,
-+void r4k_flush_cache_page(struct vm_area_struct *vma,
- 	unsigned long addr, unsigned long pfn)
- {
- 	struct flush_cache_page_args args;
-@@ -1509,3 +1509,7 @@ void __cpuinit r4k_cache_init(void)
- 	coherency_setup();
- #endif
- }
-+
-+/* fuse package DCACHE BUG patch exports */
-+void (*fuse_flush_cache_all)(void) = r4k___flush_cache_all;
-+EXPORT_SYMBOL(fuse_flush_cache_all);
diff --git a/target/linux/brcm47xx/patches-3.3/302-kmod-fuse-dcache-bug-fuse.patch b/target/linux/brcm47xx/patches-3.3/302-kmod-fuse-dcache-bug-fuse.patch
deleted file mode 100644
index 20b7e47c02..0000000000
--- a/target/linux/brcm47xx/patches-3.3/302-kmod-fuse-dcache-bug-fuse.patch
+++ /dev/null
@@ -1,46 +0,0 @@
---- a/fs/fuse/dev.c
-+++ b/fs/fuse/dev.c
-@@ -651,11 +651,20 @@ static int fuse_copy_fill(struct fuse_co
- 	return lock_request(cs->fc, cs->req);
- }
- 
-+#ifdef DCACHE_BUG
-+extern void (*fuse_flush_cache_all)(void);
-+#endif
-+
- /* Do as much copy to/from userspace buffer as we can */
- static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size)
- {
- 	unsigned ncpy = min(*size, cs->len);
- 	if (val) {
-+#ifdef DCACHE_BUG
-+		// patch from mailing list, it is very important, otherwise,
-+		// can't mount, or ls mount point will hang
-+		fuse_flush_cache_all();
-+#endif
- 		if (cs->write)
- 			memcpy(cs->buf, *val, ncpy);
- 		else
---- a/fs/fuse/fuse_i.h
-+++ b/fs/fuse/fuse_i.h
-@@ -8,6 +8,7 @@
- 
- #ifndef _FS_FUSE_I_H
- #define _FS_FUSE_I_H
-+#define DCACHE_BUG
- 
- #include <linux/fuse.h>
- #include <linux/fs.h>
---- a/fs/fuse/inode.c
-+++ b/fs/fuse/inode.c
-@@ -1210,6 +1210,10 @@ static int __init fuse_init(void)
- 	printk(KERN_INFO "fuse init (API version %i.%i)\n",
- 	       FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
- 
-+#ifdef DCACHE_BUG
-+	printk("fuse init DCACHE_BUG workaround enabled\n");
-+#endif
-+
- 	INIT_LIST_HEAD(&fuse_conn_list);
- 	res = fuse_fs_init();
- 	if (res)
diff --git a/target/linux/generic/patches-3.3/309-mips_fuse_workaround.patch b/target/linux/generic/patches-3.3/309-mips_fuse_workaround.patch
new file mode 100644
index 0000000000..78ab64f062
--- /dev/null
+++ b/target/linux/generic/patches-3.3/309-mips_fuse_workaround.patch
@@ -0,0 +1,32 @@
+--- a/arch/mips/mm/cache.c
++++ b/arch/mips/mm/cache.c
+@@ -39,6 +39,7 @@ void (*__flush_kernel_vmap_range)(unsign
+ void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
+ 
+ EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
++EXPORT_SYMBOL(__flush_cache_all);
+ 
+ /* MIPS specific cache operations */
+ void (*flush_cache_sigtramp)(unsigned long addr);
+--- a/fs/fuse/dev.c
++++ b/fs/fuse/dev.c
+@@ -19,6 +19,9 @@
+ #include <linux/pipe_fs_i.h>
+ #include <linux/swap.h>
+ #include <linux/splice.h>
++#ifdef CONFIG_MIPS
++#include <asm/cacheflush.h>
++#endif
+ 
+ MODULE_ALIAS_MISCDEV(FUSE_MINOR);
+ MODULE_ALIAS("devname:fuse");
+@@ -655,6 +658,9 @@ static int fuse_copy_fill(struct fuse_co
+ static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size)
+ {
+ 	unsigned ncpy = min(*size, cs->len);
++#ifdef CONFIG_MIPS
++	__flush_cache_all();
++#endif
+ 	if (val) {
+ 		if (cs->write)
+ 			memcpy(cs->buf, *val, ncpy);