[PATCH] mark struct file_operations const 8
Many struct file_operations in the kernel can be "const". Marking them const
moves these to the .rodata section, which avoids false sharing with potential
dirty data. In addition it'll catch accidental writes at compile time to
these shared resources.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index c80df45..8612044 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -282,9 +282,9 @@
static struct cache_detail *current_detail;
static int current_index;
-static struct file_operations cache_file_operations;
-static struct file_operations content_file_operations;
-static struct file_operations cache_flush_operations;
+static const struct file_operations cache_file_operations;
+static const struct file_operations content_file_operations;
+static const struct file_operations cache_flush_operations;
static void do_cache_clean(struct work_struct *work);
static DECLARE_DELAYED_WORK(cache_cleaner, do_cache_clean);
@@ -887,7 +887,7 @@
-static struct file_operations cache_file_operations = {
+static const struct file_operations cache_file_operations = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = cache_read,
@@ -1245,7 +1245,7 @@
return seq_release(inode, file);
}
-static struct file_operations content_file_operations = {
+static const struct file_operations content_file_operations = {
.open = content_open,
.read = seq_read,
.llseek = seq_lseek,
@@ -1297,7 +1297,7 @@
return count;
}
-static struct file_operations cache_flush_operations = {
+static const struct file_operations cache_flush_operations = {
.open = nonseekable_open,
.read = read_flush,
.write = write_flush,