From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Fri, 15 May 2020 14:36:42 +0000 Subject: [PATCH 25/29] exec: only build read_code when needed Message-Id: <20200515143646.3857579-26-hch@lst.de> List-Id: References: <20200515143646.3857579-1-hch@lst.de> In-Reply-To: <20200515143646.3857579-1-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton , Arnd Bergmann , Roman Zippel Cc: Jessica Yu , Michal Simek , x86@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, linux-fsdevel@vger.kernel.org Only build read_code when binary formats that use it are built into the kernel. Signed-off-by: Christoph Hellwig --- 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