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Date: Tue, 14 Apr 2020 22:40:08 +0100 From: Will Deacon <will@...nel.org> To: linux-kernel@...r.kernel.org Cc: Will Deacon <will@...nel.org>, "David S. Miller" <davem@...emloft.net>, Peter Zijlstra <peterz@...radead.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Matt Fleming <matt@...eblueprint.co.uk>, sparclinux@...r.kernel.org, kernel-team@...roid.com Subject: [RESEND PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() The 'size' argument to __srmmu_get_nocache() is a number of bytes not a shift value, so fix up the sanity checking to treat it properly. Cc: "David S. Miller" <davem@...emloft.net> Cc: Peter Zijlstra <peterz@...radead.org> Signed-off-by: Will Deacon <will@...nel.org> --- arch/sparc/mm/srmmu.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index b7c94de70cca..cb9ded8a68b7 100644 --- a/arch/sparc/mm/srmmu.c +++ b/arch/sparc/mm/srmmu.c @@ -175,18 +175,18 @@ pte_t *pte_offset_kernel(pmd_t *dir, unsigned long address) */ static void *__srmmu_get_nocache(int size, int align) { - int offset; + int offset, minsz = 1 << SRMMU_NOCACHE_BITMAP_SHIFT; unsigned long addr; - if (size < SRMMU_NOCACHE_BITMAP_SHIFT) { + if (size < minsz) { printk(KERN_ERR "Size 0x%x too small for nocache request\n", size); - size = SRMMU_NOCACHE_BITMAP_SHIFT; + size = minsz; } - if (size & (SRMMU_NOCACHE_BITMAP_SHIFT - 1)) { - printk(KERN_ERR "Size 0x%x unaligned int nocache request\n", + if (size & (minsz - 1)) { + printk(KERN_ERR "Size 0x%x unaligned in nocache request\n", size); - size += SRMMU_NOCACHE_BITMAP_SHIFT - 1; + size += minsz - 1; } BUG_ON(align > SRMMU_NOCACHE_ALIGN_MAX); -- 2.26.0.110.g2183baf09c-goog
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