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

SVN-Revision: 32395
This commit is contained in:
Felix Fietkau 2012-06-16 21:06:33 +00:00
parent a5e2890ecb
commit 50958f5e03
3 changed files with 32 additions and 74 deletions

View File

@ -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);

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@ -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)

View File

@ -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);