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authorChristoph Hellwig <hch@lst.de>2020-06-07 21:42:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-08 11:05:58 -0700
commit48304f7994d74ef8fddde3ff27ce41aa61453d39 (patch)
tree6cc168311b6600036c1f9595361018d644c4e05b /fs/exec.c
parenta1e81f9654eef650d3ee35c94a8cab00b5cd379c (diff)
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exec: only build read_code when needed
Only build read_code when binary formats that use it are built into the kernel. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Link: http://lkml.kernel.org/r/20200515143646.3857579-26-hch@lst.de Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 93ff1c4c7ebb..88260ec0ac34 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -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.