The quilt patch titled
Subject: mm/ioremap: consider IOREMAP space in generic ioremap
has been removed from the -mm tree. Its filename was
mm-ioremap-consider-ioremap-space-in-generic-ioremap.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: mm/ioremap: consider IOREMAP space in generic ioremap
Date: Thu, 6 Jul 2023 23:45:16 +0800
Architectures like powerpc have a dedicated space for IOREMAP mappings.
If so, use it in generic_ioremap_prot().
Link: https://lkml.kernel.org/r/20230706154520.11257-16-bhe@xxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Brian Cain <bcain@xxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Cc: David Laight <David.Laight@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Cc: Jonas Bonn <jonas@xxxxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Nathan Chancellor <nathan@xxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Niklas Schnelle <schnelle@xxxxxxxxxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Stafford Horne <shorne@xxxxxxxxx>
Cc: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx>
Cc: Sven Schnelle <svens@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/ioremap.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/mm/ioremap.c~mm-ioremap-consider-ioremap-space-in-generic-ioremap
+++ a/mm/ioremap.c
@@ -11,6 +11,15 @@
#include <linux/io.h>
#include <linux/export.h>
+/*
+ * Ioremap often, but not always uses the generic vmalloc area. E.g on
+ * Power ARCH, it could have different ioremap space.
+ */
+#ifndef IOREMAP_START
+#define IOREMAP_START VMALLOC_START
+#define IOREMAP_END VMALLOC_END
+#endif
+
void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
pgprot_t prot)
{
@@ -35,8 +44,8 @@ void __iomem *generic_ioremap_prot(phys_
if (!ioremap_allowed(phys_addr, size, pgprot_val(prot)))
return NULL;
- area = get_vm_area_caller(size, VM_IOREMAP,
- __builtin_return_address(0));
+ area = __get_vm_area_caller(size, VM_IOREMAP, IOREMAP_START,
+ IOREMAP_END, __builtin_return_address(0));
if (!area)
return NULL;
vaddr = (unsigned long)area->addr;
@@ -66,7 +75,7 @@ void generic_iounmap(volatile void __iom
if (!iounmap_allowed(vaddr))
return;
- if (is_vmalloc_addr(vaddr))
+ if (is_ioremap_addr(vaddr))
vunmap(vaddr);
}
_
Patches currently in -mm which might be from christophe.leroy@xxxxxxxxxx are
