From d02ca6d76ba7f089706db555ee19f3775bc42740 Mon Sep 17 00:00:00 2001 From: Jinbum Park Date: Tue, 12 Dec 2017 01:42:25 +0100 Subject: [PATCH] ARM: 8736/1: mm: dump: make the page table dumping seq_file This patch makes the page table dumping seq_file optional. It makes the page table dumping code usable for other cases. This patch refers below commit of arm64. (ae5d1cf358a5 ("arm64: dump: Make the page table dumping seq_file optional")) Reviewed-by: Kees Cook Tested-by: Laura Abbott Reviewed-by: Laura Abbott Acked-by: Kees Cook Signed-off-by: Jinbum Park Signed-off-by: Russell King --- arch/arm/mm/dump.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c index 8dfe7c36269d..43a2beedbbf3 100644 --- a/arch/arm/mm/dump.c +++ b/arch/arm/mm/dump.c @@ -34,6 +34,18 @@ static struct addr_marker address_markers[] = { { -1, NULL }, }; +#define pt_dump_seq_printf(m, fmt, args...) \ +({ \ + if (m) \ + seq_printf(m, fmt, ##args); \ +}) + +#define pt_dump_seq_puts(m, fmt) \ +({ \ + if (m) \ + seq_printf(m, fmt); \ +}) + struct pg_state { struct seq_file *seq; const struct addr_marker *marker; @@ -210,7 +222,7 @@ static void dump_prot(struct pg_state *st, const struct prot_bits *bits, size_t s = bits->clear; if (s) - seq_printf(st->seq, " %s", s); + pt_dump_seq_printf(st->seq, " %s", s); } } @@ -224,7 +236,7 @@ static void note_page(struct pg_state *st, unsigned long addr, st->level = level; st->current_prot = prot; st->current_domain = domain; - seq_printf(st->seq, "---[ %s ]---\n", st->marker->name); + pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name); } else if (prot != st->current_prot || level != st->level || domain != st->current_domain || addr >= st->marker[1].start_address) { @@ -232,7 +244,7 @@ static void note_page(struct pg_state *st, unsigned long addr, unsigned long delta; if (st->current_prot) { - seq_printf(st->seq, "0x%08lx-0x%08lx ", + pt_dump_seq_printf(st->seq, "0x%08lx-0x%08lx ", st->start_address, addr); delta = (addr - st->start_address) >> 10; @@ -240,17 +252,19 @@ static void note_page(struct pg_state *st, unsigned long addr, delta >>= 10; unit++; } - seq_printf(st->seq, "%9lu%c", delta, *unit); + pt_dump_seq_printf(st->seq, "%9lu%c", delta, *unit); if (st->current_domain) - seq_printf(st->seq, " %s", st->current_domain); + pt_dump_seq_printf(st->seq, " %s", + st->current_domain); if (pg_level[st->level].bits) dump_prot(st, pg_level[st->level].bits, pg_level[st->level].num); - seq_printf(st->seq, "\n"); + pt_dump_seq_printf(st->seq, "\n"); } if (addr >= st->marker[1].start_address) { st->marker++; - seq_printf(st->seq, "---[ %s ]---\n", st->marker->name); + pt_dump_seq_printf(st->seq, "---[ %s ]---\n", + st->marker->name); } st->start_address = addr; st->current_prot = prot; -- 2.45.2