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s390/pci: enforce fmb page boundary rule
The function measurement block must not cross a page boundary. Ensure
that by raising the alignment requirement to the smallest power of 2
larger than the size of the fmb.
Fixes: d0b088531
("s390/pci: performance statistics and debug infrastructure")
Cc: stable@vger.kernel.org # v3.8+
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
parent
e370e47694
commit
80c544ded2
2 changed files with 5 additions and 2 deletions
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@ -45,7 +45,7 @@ struct zpci_fmb {
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u64 rpcit_ops;
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u64 dma_rbytes;
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u64 dma_wbytes;
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} __packed __aligned(16);
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} __packed __aligned(64);
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enum zpci_state {
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ZPCI_FN_STATE_RESERVED,
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@ -860,8 +860,11 @@ static inline int barsize(u8 size)
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static int zpci_mem_init(void)
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{
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BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
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__alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
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zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
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16, 0, NULL);
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__alignof__(struct zpci_fmb), 0, NULL);
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if (!zdev_fmb_cache)
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goto error_fmb;
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