1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _ASM_X86_SECTIONS_H 3*4882a593Smuzhiyun #define _ASM_X86_SECTIONS_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #define arch_is_kernel_initmem_freed arch_is_kernel_initmem_freed 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #include <asm-generic/sections.h> 8*4882a593Smuzhiyun #include <asm/extable.h> 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun extern char __brk_base[], __brk_limit[]; 11*4882a593Smuzhiyun extern char __cfi_jt_start[], __cfi_jt_end[]; 12*4882a593Smuzhiyun extern char __end_rodata_aligned[]; 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #if defined(CONFIG_X86_64) 15*4882a593Smuzhiyun extern char __end_rodata_hpage_align[]; 16*4882a593Smuzhiyun #endif 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun extern char __end_of_kernel_reserve[]; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun extern unsigned long _brk_start, _brk_end; 21*4882a593Smuzhiyun arch_is_kernel_initmem_freed(unsigned long addr)22*4882a593Smuzhiyunstatic inline bool arch_is_kernel_initmem_freed(unsigned long addr) 23*4882a593Smuzhiyun { 24*4882a593Smuzhiyun /* 25*4882a593Smuzhiyun * If _brk_start has not been cleared, brk allocation is incomplete, 26*4882a593Smuzhiyun * and we can not make assumptions about its use. 27*4882a593Smuzhiyun */ 28*4882a593Smuzhiyun if (_brk_start) 29*4882a593Smuzhiyun return 0; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /* 32*4882a593Smuzhiyun * After brk allocation is complete, space between _brk_end and _end 33*4882a593Smuzhiyun * is available for allocation. 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun return addr >= _brk_end && addr < (unsigned long)&_end; 36*4882a593Smuzhiyun } 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun #endif /* _ASM_X86_SECTIONS_H */ 39