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authorLiao Chang <liaochang1@huawei.com>2022-04-08 18:09:09 +0800
committerPalmer Dabbelt <palmer@rivosinc.com>2022-05-19 11:53:35 -0700
commit4853f68d158ac59b05985a6af5b7da7ccdbc14c8 (patch)
treea39e011fe8eb415fe5fc80083fa5fbf2a3975bee
parent3123109284176b1532874591f7c81f3837bbdc17 (diff)
kexec_file: Fix kexec_file.c build error for riscv platform
When CONFIG_KEXEC_FILE is set for riscv platform, the compilation of kernel/kexec_file.c generate build error: kernel/kexec_file.c: In function 'crash_prepare_elf64_headers': ./arch/riscv/include/asm/page.h:110:71: error: request for member 'virt_addr' in something not a structure or union 110 | ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < kernel_map.virt_addr)) | ^ ./arch/riscv/include/asm/page.h:131:2: note: in expansion of macro 'is_linear_mapping' 131 | is_linear_mapping(_x) ? \ | ^~~~~~~~~~~~~~~~~ ./arch/riscv/include/asm/page.h:140:31: note: in expansion of macro '__va_to_pa_nodebug' 140 | #define __phys_addr_symbol(x) __va_to_pa_nodebug(x) | ^~~~~~~~~~~~~~~~~~ ./arch/riscv/include/asm/page.h:143:24: note: in expansion of macro '__phys_addr_symbol' 143 | #define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0)) | ^~~~~~~~~~~~~~~~~~ kernel/kexec_file.c:1327:36: note: in expansion of macro '__pa_symbol' 1327 | phdr->p_offset = phdr->p_paddr = __pa_symbol(_text); This occurs is because the "kernel_map" referenced in macro is_linear_mapping() is suppose to be the one of struct kernel_mapping defined in arch/riscv/mm/init.c, but the 2nd argument of crash_prepare_elf64_header() has same symbol name, in expansion of macro is_linear_mapping in function crash_prepare_elf64_header(), "kernel_map" actually is the local variable. Signed-off-by: Liao Chang <liaochang1@huawei.com> Link: https://lore.kernel.org/r/20220408100914.150110-2-lizhengyu3@huawei.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
-rw-r--r--include/linux/kexec.h2
-rw-r--r--kernel/kexec_file.c4
2 files changed, 3 insertions, 3 deletions
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 58d1b58a971e..ebb1bffbf068 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -227,7 +227,7 @@ struct crash_mem {
extern int crash_exclude_mem_range(struct crash_mem *mem,
unsigned long long mstart,
unsigned long long mend);
-extern int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
+extern int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
void **addr, unsigned long *sz);
#endif /* CONFIG_KEXEC_FILE */
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 8347fc158d2b..331a4f0f10f5 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -1260,7 +1260,7 @@ int crash_exclude_mem_range(struct crash_mem *mem,
return 0;
}
-int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
+int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
void **addr, unsigned long *sz)
{
Elf64_Ehdr *ehdr;
@@ -1324,7 +1324,7 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int kernel_map,
phdr++;
/* Prepare PT_LOAD type program header for kernel text region */
- if (kernel_map) {
+ if (need_kernel_map) {
phdr->p_type = PT_LOAD;
phdr->p_flags = PF_R|PF_W|PF_X;
phdr->p_vaddr = (unsigned long) _text;