From 6d708d1a0d81fe85a114766ff6beb3037fa77429 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 10 Feb 2023 22:05:09 +0100 Subject: um: don't export printf() Since printf() cannot be used in kernel threads (it uses too much stack space) don't export it for modules either. This should leave us exporting only things that are absolutely critical (such as memset and friends) and things that are injected by the compiler (stack guard and similar.) Signed-off-by: Johannes Berg Signed-off-by: Richard Weinberger --- arch/um/os-Linux/user_syms.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'arch/um/os-Linux') diff --git a/arch/um/os-Linux/user_syms.c b/arch/um/os-Linux/user_syms.c index 22ed13a9b3e7..1e9e92740b32 100644 --- a/arch/um/os-Linux/user_syms.c +++ b/arch/um/os-Linux/user_syms.c @@ -18,7 +18,6 @@ extern size_t strlen(const char *); extern void *memmove(void *, const void *, size_t); extern void *memset(void *, int, size_t); -extern int printf(const char *, ...); /* If it's not defined, the export is included in lib/string.c.*/ #ifdef __HAVE_ARCH_STRSTR @@ -32,8 +31,6 @@ EXPORT_SYMBOL(memmove); EXPORT_SYMBOL(memset); #endif -EXPORT_SYMBOL(printf); - #ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA EXPORT_SYMBOL(vsyscall_ehdr); EXPORT_SYMBOL(vsyscall_end); -- cgit v1.2.3