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Linux 5.8 compat: __vmalloc()

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The `pgprot` argument has been removed from `__vmalloc` in Linux 5.8,
being `PAGE_KERNEL` always now [1].

Detect this during configure and define a wrapper for older kernels.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/mm/vmalloc.c?h=next-20200605&id=88dca4ca5a93d2c09e5bbc6a62fbfc3af83c4fca

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Co-authored-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Co-authored-by: Michael Niewöhner <foss@mniewoehner.de>
Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Closes #10422
This commit is contained in:
Michael Niewöhner
2020-06-09 01:32:02 +02:00
committed by GitHub
parent 529246df96
commit 080102a1b6
5 changed files with 46 additions and 11 deletions
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module/os/linux/spl/spl-kmem-cache.c
+2 -2
View File
@@ -203,7 +203,7 @@ kv_alloc(spl_kmem_cache_t *skc, int size, int flags)
ASSERT(ISP2(size));
ptr = (void *)__get_free_pages(lflags, get_order(size));
} else {
ptr = __vmalloc(size, lflags | __GFP_HIGHMEM, PAGE_KERNEL);
ptr = spl_vmalloc(size, lflags | __GFP_HIGHMEM);
}
/* Resulting allocated memory will be page aligned */
@@ -1251,7 +1251,7 @@ spl_cache_grow(spl_kmem_cache_t *skc, int flags, void **obj)
* allocation.
*
* However, this can't be applied to KVM_VMEM due to a bug that
* __vmalloc() doesn't honor gfp flags in page table allocation.
* spl_vmalloc() doesn't honor gfp flags in page table allocation.
*/
if (!(skc->skc_flags & KMC_VMEM) && !(skc->skc_flags & KMC_KVMEM)) {
rc = __spl_cache_grow(skc, flags | KM_NOSLEEP);