diff options
Diffstat (limited to 'fs/dcache.c')
-rw-r--r-- | fs/dcache.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/dcache.c b/fs/dcache.c index bcbdb33fcc20..ffd47a16d870 100644 --- a/fs/dcache.c +++ b/fs/dcache.c | |||
@@ -144,6 +144,28 @@ int proc_nr_dentry(ctl_table *table, int write, void __user *buffer, | |||
144 | static inline int dentry_cmp(const unsigned char *cs, size_t scount, | 144 | static inline int dentry_cmp(const unsigned char *cs, size_t scount, |
145 | const unsigned char *ct, size_t tcount) | 145 | const unsigned char *ct, size_t tcount) |
146 | { | 146 | { |
147 | #ifdef CONFIG_DCACHE_WORD_ACCESS | ||
148 | unsigned long a,b,mask; | ||
149 | |||
150 | if (unlikely(scount != tcount)) | ||
151 | return 1; | ||
152 | |||
153 | for (;;) { | ||
154 | a = *(unsigned long *)cs; | ||
155 | b = *(unsigned long *)ct; | ||
156 | if (tcount < sizeof(unsigned long)) | ||
157 | break; | ||
158 | if (unlikely(a != b)) | ||
159 | return 1; | ||
160 | cs += sizeof(unsigned long); | ||
161 | ct += sizeof(unsigned long); | ||
162 | tcount -= sizeof(unsigned long); | ||
163 | if (!tcount) | ||
164 | return 0; | ||
165 | } | ||
166 | mask = ~(~0ul << tcount*8); | ||
167 | return unlikely(!!((a ^ b) & mask)); | ||
168 | #else | ||
147 | if (scount != tcount) | 169 | if (scount != tcount) |
148 | return 1; | 170 | return 1; |
149 | 171 | ||
@@ -155,6 +177,7 @@ static inline int dentry_cmp(const unsigned char *cs, size_t scount, | |||
155 | tcount--; | 177 | tcount--; |
156 | } while (tcount); | 178 | } while (tcount); |
157 | return 0; | 179 | return 0; |
180 | #endif | ||
158 | } | 181 | } |
159 | 182 | ||
160 | static void __d_free(struct rcu_head *head) | 183 | static void __d_free(struct rcu_head *head) |