[OpenRISC] [PATCH 27/31] exec: only build read_code when needed

Christoph Hellwig
2020-05-10T07:55:06Z

Only build read_code when binary formats that use it are built into the
kernel.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/exec.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/fs/exec.c b/fs/exec.c
index 06b4c550af5d9..a4f766f296f8f 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1027,6 +1027,8 @@ int kernel_read_file_from_fd(int fd, void **buf, loff_t *size, loff_t max_size,
}
EXPORT_SYMBOL_GPL(kernel_read_file_from_fd);

+#if defined(CONFIG_HAVE_AOUT) || defined(CONFIG_BINFMT_FLAT) || \
+ defined(CONFIG_BINFMT_ELF_FDPIC)
ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len)
{
ssize_t res = vfs_read(file, (void __user *)addr, len, &pos);
@@ -1035,6 +1037,7 @@ ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len)
return res;
}
EXPORT_SYMBOL(read_code);
+#endif

/*
* Maps the mm_struct mm into the current task struct.
--
2.26.2