From: Arjan van de Ven Date: Thu, 15 Nov 2007 01:00:10 +0000 (-0800) Subject: mark sys_open/sys_read exports unused X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cb51f973bce7aef46452b0c6faea8f791885f5b8;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git mark sys_open/sys_read exports unused sys_open / sys_read were used in the early 1.2 days to load firmware from disk inside drivers. Since 2.0 or so this was deprecated behavior, but several drivers still were using this. Since a few years we have a request_firmware() API that implements this in a nice, consistent way. Only some old ISA sound drivers (pre-ALSA) still straggled along for some time.... however with commit c2b1239a9f22f19c53543b460b24507d0e21ea0c the last user is now gone. This is a good thing, since using sys_open / sys_read etc for firmware is a very buggy to dangerous thing to do; these operations put an fd in the process file descriptor table.... which then can be tampered with from other threads for example. For those who don't want the firmware loader, filp_open()/vfs_read are the better APIs to use, without this security issue. The patch below marks sys_open and sys_read unused now that they're really not used anymore, and for deletion in the 2.6.25 timeframe. Signed-off-by: Arjan van de Ven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/fs/open.c b/fs/open.c index 3b69c53e1837..4932b4d1da05 100644 --- a/fs/open.c +++ b/fs/open.c @@ -1061,7 +1061,7 @@ asmlinkage long sys_open(const char __user *filename, int flags, int mode) prevent_tail_call(ret); return ret; } -EXPORT_SYMBOL_GPL(sys_open); +EXPORT_UNUSED_SYMBOL_GPL(sys_open); /* To be deleted for 2.6.25 */ asmlinkage long sys_openat(int dfd, const char __user *filename, int flags, int mode) diff --git a/fs/read_write.c b/fs/read_write.c index 124693e8d3fa..ea1f94cc722e 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -370,7 +370,7 @@ asmlinkage ssize_t sys_read(unsigned int fd, char __user * buf, size_t count) return ret; } -EXPORT_SYMBOL_GPL(sys_read); +EXPORT_UNUSED_SYMBOL_GPL(sys_read); /* to be deleted for 2.6.25 */ asmlinkage ssize_t sys_write(unsigned int fd, const char __user * buf, size_t count) {