exec: only build read_code when needed (48304f79) · Commits · 戴 / test

Only build read_code when binary formats that use it are built into the kernel. Signed-off-by:

fs/exec.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1053,6 +1053,8 @@ out:
		}
		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);
		@@ -1061,6 +1063,7 @@ 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.