From d538aadc2718a95bfd80095c66ea814824535b34 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Thu, 12 Sep 2019 13:49:44 +0000 Subject: [PATCH] powerpc/ioremap: warn on early use of ioremap() Powerpc now has EARLY_IOREMAP. Next step is to convert all early users of ioremap() to early_ioremap(). Add a warning to help locate those users. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/b4f03a68ee8e68773c8973d74ec35f9c82c72871.1568295907.git.christophe.leroy@c-s.fr --- arch/powerpc/mm/ioremap_32.c | 1 + arch/powerpc/mm/ioremap_64.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/powerpc/mm/ioremap_32.c b/arch/powerpc/mm/ioremap_32.c index f36121f25243..743e11384dea 100644 --- a/arch/powerpc/mm/ioremap_32.c +++ b/arch/powerpc/mm/ioremap_32.c @@ -68,6 +68,7 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, pgprot_t prot, void *call /* * Should check if it is a candidate for a BAT mapping */ + pr_warn("ioremap() called early from %pS. Use early_ioremap() instead\n", caller); err = early_ioremap_range(ioremap_bot - size, p, size, prot); if (err) diff --git a/arch/powerpc/mm/ioremap_64.c b/arch/powerpc/mm/ioremap_64.c index fd29e51700cd..50a99d9684f7 100644 --- a/arch/powerpc/mm/ioremap_64.c +++ b/arch/powerpc/mm/ioremap_64.c @@ -81,6 +81,8 @@ void __iomem *__ioremap_caller(phys_addr_t addr, unsigned long size, if (slab_is_available()) return do_ioremap(paligned, offset, size, prot, caller); + pr_warn("ioremap() called early from %pS. Use early_ioremap() instead\n", caller); + err = early_ioremap_range(ioremap_bot, paligned, size, prot); if (err) return NULL; -- 2.30.2