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Message-ID: <20190506101351.GA122275@gmail.com>
Date: Mon, 6 May 2019 12:13:51 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86/cleanups for v5.2
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)
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