[GIT PULL] x86/cleanups for v5.2

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest x86-cleanups-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-cleanups-for-linus

   # HEAD: 15854edd193ae5d9daf8f50ce5f9f1724cebe344 x86/pci: Clean up usage of X86_DEV_DMA_OPS

A handful of cleanups: dma-ops cleanups, missing boot time kcalloc() 
check, a Sparse fix and use struct_size() to simplify a vzalloc() call.


  out-of-topic modifications in x86-cleanups-for-linus:
  -------------------------------------------------------
  drivers/misc/mic/Kconfig           # 15854edd193a: x86/pci: Clean up usage of X
  drivers/pci/controller/Kconfig     # 15854edd193a: x86/pci: Clean up usage of X
  drivers/pci/controller/vmd.c       # 15854edd193a: x86/pci: Clean up usage of X

 Thanks,

	Ingo

------------------>
Christoph Hellwig (2):
      x86/Kconfig: Remove the unused X86_DMA_REMAP KConfig symbol
      x86/pci: Clean up usage of X86_DEV_DMA_OPS

Gustavo A. R. Silva (1):
      x86/kexec/crash: Use struct_size() in vzalloc()

Jann Horn (1):
      x86/mm/tlb: Define LOADED_MM_SWITCHING with pointer-sized number

Kangjie Lu (1):
      x86/platform/uv: Fix missing checks of kcalloc() return values


 arch/x86/Kconfig                | 8 --------
 arch/x86/include/asm/tlbflush.h | 2 +-
 arch/x86/kernel/crash.c         | 3 +--
 arch/x86/platform/uv/tlb_uv.c   | 7 ++++++-
 drivers/misc/mic/Kconfig        | 4 ++--
 drivers/pci/controller/Kconfig  | 1 +
 drivers/pci/controller/vmd.c    | 7 -------
 7 files changed, 11 insertions(+), 21 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c1f9b3cf437c..60f6459344bc 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -28,7 +28,6 @@ config X86_64
 	select MODULES_USE_ELF_RELA
 	select NEED_DMA_MAP_STATE
 	select SWIOTLB
-	select X86_DEV_DMA_OPS
 	select ARCH_HAS_SYSCALL_WRAPPER
 
 #
@@ -703,8 +702,6 @@ config STA2X11
 	bool "STA2X11 Companion Chip Support"
 	depends on X86_32_NON_STANDARD && PCI
 	select ARCH_HAS_PHYS_TO_DMA
-	select X86_DEV_DMA_OPS
-	select X86_DMA_REMAP
 	select SWIOTLB
 	select MFD_STA2X11
 	select GPIOLIB
@@ -2884,11 +2881,6 @@ config HAVE_ATOMIC_IOMAP
 
 config X86_DEV_DMA_OPS
 	bool
-	depends on X86_64 || STA2X11
-
-config X86_DMA_REMAP
-	bool
-	depends on STA2X11
 
 config HAVE_GENERIC_GUP
 	def_bool y
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index f4204bf377fc..90926e8dd1f8 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -167,7 +167,7 @@ struct tlb_state {
 	 */
 	struct mm_struct *loaded_mm;
 
-#define LOADED_MM_SWITCHING ((struct mm_struct *)1)
+#define LOADED_MM_SWITCHING ((struct mm_struct *)1UL)
 
 	/* Last user mm for optimizing IBPB */
 	union {
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 17ffc869cab8..a96ca8584803 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -204,8 +204,7 @@ static struct crash_mem *fill_up_crash_elf_data(void)
 	 * another range split. So add extra two slots here.
 	 */
 	nr_ranges += 2;
-	cmem = vzalloc(sizeof(struct crash_mem) +
-			sizeof(struct crash_mem_range) * nr_ranges);
+	cmem = vzalloc(struct_size(cmem, ranges, nr_ranges));
 	if (!cmem)
 		return NULL;
 
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 2c53b0f19329..1297e185b8c8 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -2133,14 +2133,19 @@ static int __init summarize_uvhub_sockets(int nuvhubs,
  */
 static int __init init_per_cpu(int nuvhubs, int base_part_pnode)
 {
-	unsigned char *uvhub_mask;
 	struct uvhub_desc *uvhub_descs;
+	unsigned char *uvhub_mask = NULL;
 
 	if (is_uv3_hub() || is_uv2_hub() || is_uv1_hub())
 		timeout_us = calculate_destination_timeout();
 
 	uvhub_descs = kcalloc(nuvhubs, sizeof(struct uvhub_desc), GFP_KERNEL);
+	if (!uvhub_descs)
+		goto fail;
+
 	uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL);
+	if (!uvhub_mask)
+		goto fail;
 
 	if (get_cpu_topology(base_part_pnode, uvhub_descs, uvhub_mask))
 		goto fail;
diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig
index 242dcee14689..6736f72cc14a 100644
--- a/drivers/misc/mic/Kconfig
+++ b/drivers/misc/mic/Kconfig
@@ -4,7 +4,7 @@ comment "Intel MIC Bus Driver"
 
 config INTEL_MIC_BUS
 	tristate "Intel MIC Bus Driver"
-	depends on 64BIT && PCI && X86 && X86_DEV_DMA_OPS
+	depends on 64BIT && PCI && X86
 	help
 	  This option is selected by any driver which registers a
 	  device or driver on the MIC Bus, such as CONFIG_INTEL_MIC_HOST,
@@ -21,7 +21,7 @@ comment "SCIF Bus Driver"
 
 config SCIF_BUS
 	tristate "SCIF Bus Driver"
-	depends on 64BIT && PCI && X86 && X86_DEV_DMA_OPS
+	depends on 64BIT && PCI && X86
 	help
 	  This option is selected by any driver which registers a
 	  device or driver on the SCIF Bus, such as CONFIG_INTEL_MIC_HOST
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 6012f3059acd..011c57cae4b0 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -267,6 +267,7 @@ config PCIE_TANGO_SMP8759
 
 config VMD
 	depends on PCI_MSI && X86_64 && SRCU
+	select X86_DEV_DMA_OPS
 	tristate "Intel Volume Management Device Driver"
 	---help---
 	  Adds support for the Intel Volume Management Device (VMD). VMD is a
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c
index cf6816b55b5e..999a5509e57e 100644
--- a/drivers/pci/controller/vmd.c
+++ b/drivers/pci/controller/vmd.c
@@ -95,10 +95,8 @@ struct vmd_dev {
 	struct irq_domain	*irq_domain;
 	struct pci_bus		*bus;
 
-#ifdef CONFIG_X86_DEV_DMA_OPS
 	struct dma_map_ops	dma_ops;
 	struct dma_domain	dma_domain;
-#endif
 };
 
 static inline struct vmd_dev *vmd_from_bus(struct pci_bus *bus)
@@ -293,7 +291,6 @@ static struct msi_domain_info vmd_msi_domain_info = {
 	.chip		= &vmd_msi_controller,
 };
 
-#ifdef CONFIG_X86_DEV_DMA_OPS
 /*
  * VMD replaces the requester ID with its own.  DMA mappings for devices in a
  * VMD domain need to be mapped for the VMD, not the device requiring
@@ -438,10 +435,6 @@ static void vmd_setup_dma_ops(struct vmd_dev *vmd)
 	add_dma_domain(domain);
 }
 #undef ASSIGN_VMD_DMA_OPS
-#else
-static void vmd_teardown_dma_ops(struct vmd_dev *vmd) {}
-static void vmd_setup_dma_ops(struct vmd_dev *vmd) {}
-#endif
 
 static char __iomem *vmd_cfg_addr(struct vmd_dev *vmd, struct pci_bus *bus,
 				  unsigned int devfn, int reg, int len)