Re: [PATCH v3 3/4] arch, mm: restore dependency of __kernel_map_pages() of DEBUG_PAGEALLOC
From: David Hildenbrand <hidden>
Date: 2020-11-02 09:23:41
Also in:
linux-mm, linux-pm, linux-riscv, linux-s390, linuxppc-dev, lkml, sparclinux
quoted hunk ↗ jump to hunk
int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn, unsigned long address, unsigned numpages, unsigned long page_flags)diff --git a/include/linux/mm.h b/include/linux/mm.h index 14e397f3752c..ab0ef6bd351d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h@@ -2924,7 +2924,11 @@ static inline bool debug_pagealloc_enabled_static(void) return static_branch_unlikely(&_debug_pagealloc_enabled); } -#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_ARCH_HAS_SET_DIRECT_MAP) +#ifdef CONFIG_DEBUG_PAGEALLOC +/* + * To support DEBUG_PAGEALLOC architecture must ensure that + * __kernel_map_pages() never fails
Maybe add here, that this implies mapping everything via PTEs during boot. Acked-by: David Hildenbrand <redacted> -- Thanks, David / dhildenb _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel