Hi Baoquan, [auto build test WARNING on tip/auto-latest] [also build test WARNING on next-20170615] [cannot apply to tip/x86/core v4.12-rc5] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Baoquan-He/x86-boot-KASLR-Restrict-kernel-to-be-randomized-in-mirror-regions-if-existed/20170615-204125 config: i386-defconfig (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): arch/x86/boot/compressed/kaslr.c: In function 'process_efi_entry': >> arch/x86/boot/compressed/kaslr.c:604:24: warning: 'return' with a value, in >> function returning void return -EINVAL; ^ arch/x86/boot/compressed/kaslr.c:566:13: note: declared here static void process_efi_entry(unsigned long minimum, unsigned long image_size) ^~~~~~~~~~~~~~~~~ vim +/return +604 arch/x86/boot/compressed/kaslr.c 588 589 /* 590 * Mirrored regions are meaningful only if "kernelcore=mirror" 591 * specified. 592 */ 593 str = strstr(cmdline, "kernelcore="); 594 if (!str) 595 return; 596 str += strlen("kernelcore="); 597 if (strncmp(str, "mirror", 6)) 598 return; 599 600 #ifdef CONFIG_X86_32 601 /* Can't handle data above 4GB at this time */ 602 if (e->efi_memmap_hi) { 603 warn("Memory map is above 4GB, disabling EFI.\n"); > 604 return -EINVAL; 605 } 606 pmap = e->efi_memmap; 607 #else 608 pmap = (e->efi_memmap | ((__u64)e->efi_memmap_hi << 32)); 609 #endif 610 611 nr_desc = e->efi_memmap_size / e->efi_memdesc_size; 612 for (i = 0; i < nr_desc; i++) { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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