// SPDX-License-Identifier: GPL-2.0 #include <linux/types.h> #include <linux/mmdebug.h> #include <linux/mm.h> #include <asm/page.h> #include <asm/sections.h> phys_addr_t __virt_to_phys(unsigned long x) { phys_addr_t y = x - PAGE_OFFSET; /* * Boundary checking aginst the kernel linear mapping space. */ WARN(y >= KERN_VIRT_SIZE, "virt_to_phys used for non-linear address: %pK (%pS)\n", (void *)x, (void *)x); return __va_to_pa_nodebug(x); } EXPORT_SYMBOL(__virt_to_phys); phys_addr_t __phys_addr_symbol(unsigned long x) { unsigned long kernel_start = kernel_map.virt_addr; unsigned long kernel_end = (unsigned long)_end; /* * Boundary checking aginst the kernel image mapping. * __pa_symbol should only be used on kernel symbol addresses. */ VIRTUAL_BUG_ON(x < kernel_start || x > kernel_end); return __va_to_pa_nodebug(x); } EXPORT_SYMBOL(__phys_addr_symbol);