On Mon, Jul 13, 2020 at 09:19:37PM +0300, Jarkko Sakkinen wrote: > Rename module_alloc() to text_alloc() and module_memfree() to > text_memfree(), and move them to kernel/text.c, which is unconditionally > compiled to the kernel proper. This allows kprobes, ftrace and bpf to > allocate space for executable code without requiring to compile the modules > support (CONFIG_MODULES=y) in.
I'm not sure this is a good idea for 32-bit ARM. The code you are moving for 32-bit ARM is quite specific to module use in that it also supports allocating from the vmalloc area, where the module code knows to add PLT entries. If the other proposed users of this text_alloc() do not have the logic to add PLT entries when branches between kernel code and this allocation are not reachable by, e.g. a 26-bit signed offset for 32-bit ARM code, then this code is not suitable for that use. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
