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authorAl Viro <viro@zeniv.linux.org.uk>2013-04-13 20:31:37 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-04-29 15:40:23 -0400
commit3dc20cb282ec03cc4c997130d680c800011ed479 (patch)
treed8374e58a433a144c571e193cb0b024374ee0b6a /fs/exec.c
parent3af0761307d04f6b9a4626fb80011a22c143d75e (diff)
downloadlwn-3dc20cb282ec03cc4c997130d680c800011ed479.tar.gz
lwn-3dc20cb282ec03cc4c997130d680c800011ed479.zip
new helper: read_code()
switch binfmts that use ->read() to that (and to kernel_read() in several cases in binfmt_flat - sure, it's nommu, but still, doing ->read() into kmalloc'ed buffer...) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index a96a4885bbbf..77dc9096440f 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -802,6 +802,15 @@ int kernel_read(struct file *file, loff_t offset,
EXPORT_SYMBOL(kernel_read);
+ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len)
+{
+ ssize_t res = file->f_op->read(file, (void __user *)addr, len, &pos);
+ if (res > 0)
+ flush_icache_range(addr, addr + len);
+ return res;
+}
+EXPORT_SYMBOL(read_code);
+
static int exec_mmap(struct mm_struct *mm)
{
struct task_struct *tsk;