Claudio Imbrenda 15a64f5a88 mm/vmalloc: add vmalloc_no_huge ... Patch series "mm: add vmalloc_no_huge and use it", v4. Add vmalloc_no_huge() and export it, so modules can allocate memory with small pages. Use the newly added vmalloc_no_huge() in KVM on s390 to get around a hardware limitation. This patch (of 2): Commit 121e6f3258 ("mm/vmalloc: hugepage vmalloc mappings") added support for hugepage vmalloc mappings, it also added the flag VM_NO_HUGE_VMAP for __vmalloc_node_range to request the allocation to be performed with 0-order non-huge pages. This flag is not accessible when calling vmalloc, the only option is to call directly __vmalloc_node_range, which is not exported. This means that a module can't vmalloc memory with small pages. Case in point: KVM on s390x needs to vmalloc a large area, and it needs to be mapped with non-huge pages, because of a hardware limitation. This patch adds the function vmalloc_no_huge, which works like vmalloc, but it is guaranteed to always back the mapping using small pages. This new function is exported, therefore it is usable by modules. [akpm@linux-foundation.org: whitespace fixes, per Christoph] Link: https://lkml.kernel.org/r/20210614132357.10202-1-imbrenda@linux.ibm.com Link: https://lkml.kernel.org/r/20210614132357.10202-2-imbrenda@linux.ibm.com Fixes: 121e6f3258 ("mm/vmalloc: hugepage vmalloc mappings") Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Acked-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: David Hildenbrand <david@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-06-24 19:40:53 -07:00
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acpi
asm-generic	vmlinux.lds.h: Avoid orphan section with !SMP	2021-06-02 12:43:55 -07:00
clocksource
crypto
drm
dt-bindings	dt-bindings: connector: Add PD rev 2.0 VDO definition	2021-06-04 11:43:01 +02:00
keys	integrity-v5.13	2021-05-01 15:32:18 -07:00
kunit
kvm
linux	mm/vmalloc: add vmalloc_no_huge	2021-06-24 19:40:53 -07:00
math-emu
media
memory
misc
net	net: inline function get_net_ns_by_fd if NET_NS is disabled	2021-06-15 11:00:45 -07:00
pcmcia
ras
rdma
scsi
soc
sound	ASoC: Fixes for v5.13	2021-05-25 08:58:01 +02:00
target
trace	NFS client updates for Linux 5.13	2021-05-07 11:23:41 -07:00
uapi	Networking fixes for 5.13-rc7, including fixes from wireless, bpf,	2021-06-18 18:55:29 -07:00
vdso
video
xen	xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h	2021-05-14 15:52:05 +02:00