From c0891ac15f0428ffa81b2e818d416bdf3cb74ab6 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Mon, 2 Aug 2021 23:40:32 +0300 Subject: isystem: ship and use stdarg.h Ship minimal stdarg.h (1 type, 4 macros) as . stdarg.h is the only userspace header commonly used in the kernel. GPL 2 version of can be extracted from http://archive.debian.org/debian/pool/main/g/gcc-4.2/gcc-4.2_4.2.4.orig.tar.gz Signed-off-by: Alexey Dobriyan Acked-by: Rafael J. Wysocki Acked-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada --- lib/vsprintf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'lib/vsprintf.c') diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 26c83943748a..3bcb7be03f93 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -17,7 +17,7 @@ * - scnprintf and vscnprintf */ -#include +#include #include #include #include -- cgit v1.2.3 From 41c961b9013ee9b6d0491f6926df546e37964b1f Mon Sep 17 00:00:00 2001 From: Muchun Song Date: Tue, 7 Sep 2021 19:56:15 -0700 Subject: mm: introduce PAGEFLAGS_MASK to replace ((1UL << NR_PAGEFLAGS) - 1) Instead of hard-coding ((1UL << NR_PAGEFLAGS) - 1) everywhere, introducing PAGEFLAGS_MASK to make the code clear to get the page flags. Link: https://lkml.kernel.org/r/20210819150712.59948-1-songmuchun@bytedance.com Signed-off-by: Muchun Song Reviewed-by: Roman Gushchin Acked-by: Johannes Weiner Reviewed-by: Shakeel Butt Cc: Michal Hocko Cc: Vladimir Davydov Cc: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/page-flags.h | 4 +++- include/trace/events/page_ref.h | 4 ++-- lib/test_printf.c | 2 +- lib/vsprintf.c | 2 +- 4 files changed, 7 insertions(+), 5 deletions(-) (limited to 'lib/vsprintf.c') diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 5922031ffab6..6b8d66965145 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -178,6 +178,8 @@ enum pageflags { PG_reported = PG_uptodate, }; +#define PAGEFLAGS_MASK ((1UL << NR_PAGEFLAGS) - 1) + #ifndef __GENERATING_BOUNDS_H static inline unsigned long _compound_head(const struct page *page) @@ -859,7 +861,7 @@ static inline void ClearPageSlabPfmemalloc(struct page *page) * alloc-free cycle to prevent from reusing the page. */ #define PAGE_FLAGS_CHECK_AT_PREP \ - (((1UL << NR_PAGEFLAGS) - 1) & ~__PG_HWPOISON) + (PAGEFLAGS_MASK & ~__PG_HWPOISON) #define PAGE_FLAGS_PRIVATE \ (1UL << PG_private | 1UL << PG_private_2) diff --git a/include/trace/events/page_ref.h b/include/trace/events/page_ref.h index 5d2ea93956ce..8a99c1cd417b 100644 --- a/include/trace/events/page_ref.h +++ b/include/trace/events/page_ref.h @@ -38,7 +38,7 @@ DECLARE_EVENT_CLASS(page_ref_mod_template, TP_printk("pfn=0x%lx flags=%s count=%d mapcount=%d mapping=%p mt=%d val=%d", __entry->pfn, - show_page_flags(__entry->flags & ((1UL << NR_PAGEFLAGS) - 1)), + show_page_flags(__entry->flags & PAGEFLAGS_MASK), __entry->count, __entry->mapcount, __entry->mapping, __entry->mt, __entry->val) @@ -88,7 +88,7 @@ DECLARE_EVENT_CLASS(page_ref_mod_and_test_template, TP_printk("pfn=0x%lx flags=%s count=%d mapcount=%d mapping=%p mt=%d val=%d ret=%d", __entry->pfn, - show_page_flags(__entry->flags & ((1UL << NR_PAGEFLAGS) - 1)), + show_page_flags(__entry->flags & PAGEFLAGS_MASK), __entry->count, __entry->mapcount, __entry->mapping, __entry->mt, __entry->val, __entry->ret) diff --git a/lib/test_printf.c b/lib/test_printf.c index 8ac71aee46af..ec69953cf80c 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -614,7 +614,7 @@ page_flags_test(int section, int node, int zone, int last_cpupid, bool append = false; int i; - flags &= BIT(NR_PAGEFLAGS) - 1; + flags &= PAGEFLAGS_MASK; if (flags) { page_flags |= flags; snprintf(cmp_buf + size, BUF_SIZE - size, "%s", name); diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 26c83943748a..cc7bdd3ac2ee 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2019,7 +2019,7 @@ static const struct page_flags_fields pff[] = { static char *format_page_flags(char *buf, char *end, unsigned long flags) { - unsigned long main_flags = flags & (BIT(NR_PAGEFLAGS) - 1); + unsigned long main_flags = flags & PAGEFLAGS_MASK; bool append = false; int i; -- cgit v1.2.3 From 23efd0804c0a869dfb1e78470f80a27251317b7e Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Tue, 19 Oct 2021 15:26:21 +0100 Subject: vsprintf: Make %pGp print the hex value All existing users of %pGp want the hex value as well as the decoded flag names. This looks awkward (passing the same parameter to printf twice), so move that functionality into the core. If we want, we can make that optional with flag arguments to %pGp in the future. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Yafang Shao Reviewed-by: Petr Mladek Signed-off-by: Petr Mladek Link: https://lore.kernel.org/r/20211019142621.2810043-6-willy@infradead.org --- lib/test_printf.c | 9 +++++++-- lib/vsprintf.c | 8 ++++++++ mm/debug.c | 2 +- mm/memory-failure.c | 8 ++++---- mm/page_owner.c | 4 ++-- mm/slub.c | 4 ++-- 6 files changed, 24 insertions(+), 11 deletions(-) (limited to 'lib/vsprintf.c') diff --git a/lib/test_printf.c b/lib/test_printf.c index d09993fca463..07309c45f327 100644 --- a/lib/test_printf.c +++ b/lib/test_printf.c @@ -609,10 +609,14 @@ page_flags_test(int section, int node, int zone, int last_cpupid, char *cmp_buf) { unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag}; - unsigned long size = 0; + unsigned long size; bool append = false; int i; + for (i = 0; i < ARRAY_SIZE(values); i++) + flags |= (values[i] & pft[i].mask) << pft[i].shift; + + size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags); if (flags & PAGEFLAGS_MASK) { size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name); append = true; @@ -625,7 +629,6 @@ page_flags_test(int section, int node, int zone, int last_cpupid, if (append) size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|"); - flags |= (values[i] & pft[i].mask) << pft[i].shift; size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=", pft[i].name); size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt, @@ -633,6 +636,8 @@ page_flags_test(int section, int node, int zone, int last_cpupid, append = true; } + snprintf(cmp_buf + size, BUF_SIZE - size, ")"); + test(cmp_buf, "%pGp", &flags); } diff --git a/lib/vsprintf.c b/lib/vsprintf.c index d7ad44f2c8f5..214098248610 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2023,6 +2023,11 @@ char *format_page_flags(char *buf, char *end, unsigned long flags) bool append = false; int i; + buf = number(buf, end, flags, default_flag_spec); + if (buf < end) + *buf = '('; + buf++; + /* Page flags from the main area. */ if (main_flags) { buf = format_flags(buf, end, main_flags, pageflag_names); @@ -2051,6 +2056,9 @@ char *format_page_flags(char *buf, char *end, unsigned long flags) append = true; } + if (buf < end) + *buf = ')'; + buf++; return buf; } diff --git a/mm/debug.c b/mm/debug.c index e73fe0a8ec3d..ca9611784e4b 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -160,7 +160,7 @@ static void __dump_page(struct page *page) out_mapping: BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1); - pr_warn("%sflags: %#lx(%pGp)%s\n", type, head->flags, &head->flags, + pr_warn("%sflags: %pGp%s\n", type, &head->flags, page_cma ? " CMA" : ""); print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32, sizeof(unsigned long), page, diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 54879c339024..58ab5161a8ce 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -2109,14 +2109,14 @@ static int __soft_offline_page(struct page *page) if (!list_empty(&pagelist)) putback_movable_pages(&pagelist); - pr_info("soft offline: %#lx: %s migration failed %d, type %lx (%pGp)\n", - pfn, msg_page[huge], ret, page->flags, &page->flags); + pr_info("soft offline: %#lx: %s migration failed %d, type %pGp\n", + pfn, msg_page[huge], ret, &page->flags); if (ret > 0) ret = -EBUSY; } } else { - pr_info("soft offline: %#lx: %s isolation failed, page count %d, type %lx (%pGp)\n", - pfn, msg_page[huge], page_count(page), page->flags, &page->flags); + pr_info("soft offline: %#lx: %s isolation failed, page count %d, type %pGp\n", + pfn, msg_page[huge], page_count(page), &page->flags); ret = -EBUSY; } return ret; diff --git a/mm/page_owner.c b/mm/page_owner.c index 62402d22539b..4afc713ca525 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -351,12 +351,12 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn, pageblock_mt = get_pageblock_migratetype(page); page_mt = gfp_migratetype(page_owner->gfp_mask); ret += snprintf(kbuf + ret, count - ret, - "PFN %lu type %s Block %lu type %s Flags %#lx(%pGp)\n", + "PFN %lu type %s Block %lu type %s Flags %pGp\n", pfn, migratetype_names[page_mt], pfn >> pageblock_order, migratetype_names[pageblock_mt], - page->flags, &page->flags); + &page->flags); if (ret >= count) goto err; diff --git a/mm/slub.c b/mm/slub.c index 3d2025f7163b..f7ac28646580 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -763,9 +763,9 @@ void print_tracking(struct kmem_cache *s, void *object) static void print_page_info(struct page *page) { - pr_err("Slab 0x%p objects=%u used=%u fp=0x%p flags=%#lx(%pGp)\n", + pr_err("Slab 0x%p objects=%u used=%u fp=0x%p flags=%pGp\n", page, page->objects, page->inuse, page->freelist, - page->flags, &page->flags); + &page->flags); } -- cgit v1.2.3