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Subject[GIT PULL] s390 updates for 5.6-rc5
Hello Linus,

please pull s390 changes for 5.6-rc5.

Thank you,
Vasily

The following changes since commit 98d54f81e36ba3bf92172791eba5ca5bd813989b:

Linux 5.6-rc4 (2020-03-01 16:38:46 -0600)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-5.6-5

for you to fetch changes up to df057c914a9c219ac8b8ed22caf7da2f80c1fe26:

s390/pci: Fix unexpected write combine on resource (2020-03-04 11:18:03 +0100)

----------------------------------------------------------------
s390 updates for 5.6-rc5

- Fix panic in gup_fast on large pud by providing an implementation of
pud_write. This has been overlooked during migration to common gup code.

- Fix unexpected write combining on PCI stores.

----------------------------------------------------------------
Gerald Schaefer (1):
s390/mm: fix panic in gup_fast on large pud

Niklas Schnelle (1):
s390/pci: Fix unexpected write combine on resource

arch/s390/include/asm/pgtable.h | 6 ++++++
arch/s390/pci/pci.c | 4 ++--
2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 137a3920ca36..6d7c3b7e9281 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -752,6 +752,12 @@ static inline int pmd_write(pmd_t pmd)
return (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) != 0;
}

+#define pud_write pud_write
+static inline int pud_write(pud_t pud)
+{
+ return (pud_val(pud) & _REGION3_ENTRY_WRITE) != 0;
+}
+
static inline int pmd_dirty(pmd_t pmd)
{
return (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0;
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index bc61ea18e88d..60716d18ce5a 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -424,7 +424,7 @@ static void zpci_map_resources(struct pci_dev *pdev)

if (zpci_use_mio(zdev))
pdev->resource[i].start =
- (resource_size_t __force) zdev->bars[i].mio_wb;
+ (resource_size_t __force) zdev->bars[i].mio_wt;
else
pdev->resource[i].start = (resource_size_t __force)
pci_iomap_range_fh(pdev, i, 0, 0);
@@ -531,7 +531,7 @@ static int zpci_setup_bus_resources(struct zpci_dev *zdev,
flags |= IORESOURCE_MEM_64;

if (zpci_use_mio(zdev))
- addr = (unsigned long) zdev->bars[i].mio_wb;
+ addr = (unsigned long) zdev->bars[i].mio_wt;
else
addr = ZPCI_ADDR(entry);
size = 1UL << zdev->bars[i].size;
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