Commit d95abbbb authored by Joerg Roedel's avatar Joerg Roedel Committed by Greg Kroah-Hartman
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staging: zsmalloc: Fix link error on ARM

Testing the arm chromebook config against the upstream
kernel produces a linker error for the zsmalloc module from
staging. The symbol flush_tlb_kernel_range is not available
there. Fix this by removing the reimplementation of
unmap_kernel_range in the zsmalloc module and using the
function directly. The unmap_kernel_range function is not
usable by modules, so also disallow building the driver as a
module for now.

Cc: stable <>
Signed-off-by: default avatarJoerg Roedel <>
Acked-by: default avatarMinchan Kim <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent ab4a640e
tristate "Memory allocator for compressed pages"
bool "Memory allocator for compressed pages"
default n
zsmalloc is a slab-based memory allocator designed to store
......@@ -656,11 +656,8 @@ static inline void __zs_unmap_object(struct mapping_area *area,
struct page *pages[2], int off, int size)
unsigned long addr = (unsigned long)area->vm_addr;
unsigned long end = addr + (PAGE_SIZE * 2);
flush_cache_vunmap(addr, end);
unmap_kernel_range_noflush(addr, PAGE_SIZE * 2);
flush_tlb_kernel_range(addr, end);
unmap_kernel_range(addr, PAGE_SIZE * 2);
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