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048b31ca97
Whilst the default SLUB allocator happily just merges the original allocation flags from kmem_cache_create() with those passed through kmem_cache_alloc(), there is a code path in the SLAB allocator which will aggressively BUG_ON() if the cache was created with SLAB_CACHE_DMA but GFP_DMA is not specified for an allocation: kernel BUG at mm/slab.c:2536! Internal error: Oops - BUG: 0 [#1] SMP ARM Modules linked in:[ 1.299311] Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.5.0-rc6-koelsch-05892-ge7e45ad53ab6795e #2270 Hardware name: Generic R8A7791 (Flattened Device Tree) task: ef422040 ti: ef442000 task.ti: ef442000 PC is at cache_alloc_refill+0x2a0/0x530 LR is at _raw_spin_unlock+0x8/0xc ... [<c02c6928>] (cache_alloc_refill) from [<c02c6630>] (kmem_cache_alloc+0x7c/0xd4) [<c02c6630>] (kmem_cache_alloc) from [<c04444bc>] (__arm_v7s_alloc_table+0x5c/0x278) [<c04444bc>] (__arm_v7s_alloc_table) from [<c0444e1c>] (__arm_v7s_map.constprop.6+0x68/0x25c) [<c0444e1c>] (__arm_v7s_map.constprop.6) from [<c0445044>] (arm_v7s_map+0x34/0xa4) [<c0445044>] (arm_v7s_map) from [<c0c18ee4>] (arm_v7s_do_selftests+0x140/0x418) [<c0c18ee4>] (arm_v7s_do_selftests) from [<c0201760>] (do_one_initcall+0x100/0x1b4) [<c0201760>] (do_one_initcall) from [<c0c00d4c>] (kernel_init_freeable+0x120/0x1e8) [<c0c00d4c>] (kernel_init_freeable) from [<c067a364>] (kernel_init+0x8/0xec) [<c067a364>] (kernel_init) from [<c0206b68>] (ret_from_fork+0x14/0x2c) Code: 1a000003 e7f001f2 e3130001 0a000000 (e7f001f2) ---[ end trace 190f6f6b84352efd ]--- Keep the peace by adding GFP_DMA when allocating a table. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Joerg Roedel <jroedel@suse.de> |
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| .. | ||
| amd_iommu_init.c | ||
| amd_iommu_proto.h | ||
| amd_iommu_types.h | ||
| amd_iommu_v2.c | ||
| amd_iommu.c | ||
| arm-smmu-v3.c | ||
| arm-smmu.c | ||
| dma-iommu.c | ||
| dmar.c | ||
| exynos-iommu.c | ||
| fsl_pamu_domain.c | ||
| fsl_pamu_domain.h | ||
| fsl_pamu.c | ||
| fsl_pamu.h | ||
| intel_irq_remapping.c | ||
| intel-iommu.c | ||
| intel-svm.c | ||
| io-pgtable-arm-v7s.c | ||
| io-pgtable-arm.c | ||
| io-pgtable.c | ||
| io-pgtable.h | ||
| iommu-sysfs.c | ||
| iommu-traces.c | ||
| iommu.c | ||
| iova.c | ||
| ipmmu-vmsa.c | ||
| irq_remapping.c | ||
| irq_remapping.h | ||
| Kconfig | ||
| Makefile | ||
| msm_iommu_dev.c | ||
| msm_iommu_hw-8xxx.h | ||
| msm_iommu.c | ||
| msm_iommu.h | ||
| of_iommu.c | ||
| omap-iommu-debug.c | ||
| omap-iommu.c | ||
| omap-iommu.h | ||
| omap-iopgtable.h | ||
| rockchip-iommu.c | ||
| s390-iommu.c | ||
| tegra-gart.c | ||
| tegra-smmu.c | ||