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arm64: Fix section mismatch on alloc_init_p[mu]d()

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Commit 523d6e9fae93 (arm64:mm: free the useless initial page table)
introduced a BUG_ON checking for the allocation type but it was
referring the early_alloc() function in the __init section. This patch
changes the check to slab_is_available() and also relaxes the BUG to a
WARN_ON_ONCE.

Reported-by: Will Deacon <will.deacon@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2015-01-29 17:33:35 +00:00
parent 6917c857e3
commit 41089357e1
1 changed files with 5 additions and 4 deletions
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9
arch/arm64/mm/mmu.c
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@ -26,6 +26,7 @@
#include <linux/memblock.h>
#include <linux/fs.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/stop_machine.h>
#include <asm/cputype.h>
@ -159,8 +160,8 @@ static void alloc_init_pmd(struct mm_struct *mm, pud_t *pud,
flush_tlb_all();
if (pmd_table(old_pmd)) {
phys_addr_t table = __pa(pte_offset_map(&old_pmd, 0));
BUG_ON(alloc != early_alloc);
memblock_free(table, PAGE_SIZE);
if (!WARN_ON_ONCE(slab_is_available()))
memblock_free(table, PAGE_SIZE);
}
}
} else {
@ -220,8 +221,8 @@ static void alloc_init_pud(struct mm_struct *mm, pgd_t *pgd,
flush_tlb_all();
if (pud_table(old_pud)) {
phys_addr_t table = __pa(pmd_offset(&old_pud, 0));
BUG_ON(alloc != early_alloc);
memblock_free(table, PAGE_SIZE);
if (!WARN_ON_ONCE(slab_is_available()))
memblock_free(table, PAGE_SIZE);
}
}
} else {