From: Will Deacon <will@kernel.org> To: linux-kernel@vger.kernel.org Cc: Will Deacon <will@kernel.org>, "David S. Miller" <davem@davemloft.net>, Peter Zijlstra <peterz@infradead.org>, Nick Desaulniers <ndesaulniers@google.com>, Matt Fleming <matt@codeblueprint.co.uk>, sparclinux@vger.kernel.org, kernel-team@android.com Subject: [RESEND PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Date: Tue, 14 Apr 2020 22:40:08 +0100 [thread overview] Message-ID: <20200414214011.2699-2-will@kernel.org> (raw) In-Reply-To: <20200414214011.2699-1-will@kernel.org> 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@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Will Deacon <will@kernel.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
WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org> To: linux-kernel@vger.kernel.org Cc: Will Deacon <will@kernel.org>, "David S. Miller" <davem@davemloft.net>, Peter Zijlstra <peterz@infradead.org>, Nick Desaulniers <ndesaulniers@google.com>, Matt Fleming <matt@codeblueprint.co.uk>, sparclinux@vger.kernel.org, kernel-team@android.com Subject: [RESEND PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Date: Tue, 14 Apr 2020 21:40:08 +0000 [thread overview] Message-ID: <20200414214011.2699-2-will@kernel.org> (raw) In-Reply-To: <20200414214011.2699-1-will@kernel.org> 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@davemloft.net> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Will Deacon <will@kernel.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
next prev parent reply other threads:[~2020-04-14 21:40 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-04-14 21:40 [RESEND PATCH 0/4] Rework sparc32 page-table layout Will Deacon 2020-04-14 21:40 ` Will Deacon 2020-04-14 21:40 ` Will Deacon [this message] 2020-04-14 21:40 ` [RESEND PATCH 1/4] sparc32: mm: Fix argument checking in __srmmu_get_nocache() Will Deacon 2020-04-14 21:40 ` [RESEND PATCH 2/4] sparc32: mm: Restructure sparc32 MMU page-table layout Will Deacon 2020-04-14 21:40 ` Will Deacon 2020-04-14 21:40 ` [RESEND PATCH 3/4] sparc32: mm: Change pgtable_t type to pte_t * instead of struct page * Will Deacon 2020-04-14 21:40 ` Will Deacon 2020-04-14 21:40 ` [RESEND PATCH 4/4] sparc32: mm: Reduce allocation size for PMD and PTE tables Will Deacon 2020-04-14 21:40 ` Will Deacon 2020-05-13 22:32 ` [RESEND PATCH 0/4] Rework sparc32 page-table layout David Miller 2020-05-13 22:32 ` David Miller 2020-05-14 7:26 ` Will Deacon 2020-05-14 7:26 ` Will Deacon 2020-05-15 0:41 ` David Miller 2020-05-15 0:41 ` David Miller
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