The following commit has been merged into the locking/kcsan branch of tip: Commit-ID: f790d0205fd5bd646bbc219211903a2aa164da97 Gitweb: https://git.kernel.org/tip/f790d0205fd5bd646bbc219211903a2aa164da97 Author: Will Deacon <[email protected]> AuthorDate: Mon, 11 May 2020 21:41:33 +01:00 Committer: Thomas Gleixner <[email protected]> CommitterDate: Tue, 12 May 2020 11:04:08 +02:00
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. Signed-off-by: Will Deacon <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Cc: "David S. Miller" <[email protected]> Link: https://lkml.kernel.org/r/[email protected] --- 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 b7c94de..cb9ded8 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);
