3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Sebastian Ott <sebott@xxxxxxxxxxxxxxxxxx> commit 80c544ded25ac14d7cc3e555abb8ed2c2da99b84 upstream. 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") Signed-off-by: Sebastian Ott <sebott@xxxxxxxxxxxxxxxxxx> Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx> --- arch/s390/include/asm/pci.h | 2 +- arch/s390/pci/pci.c | 5 ++++- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h index ef803c2..17eca32 100644 --- a/arch/s390/include/asm/pci.h +++ b/arch/s390/include/asm/pci.h @@ -48,7 +48,7 @@ struct zpci_fmb { atomic64_t allocated_pages; atomic64_t mapped_pages; atomic64_t unmapped_pages; -} __packed __aligned(16); +} __packed __aligned(64); enum zpci_state { ZPCI_FN_STATE_RESERVED, diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 3290f11..11fba5b 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -841,8 +841,11 @@ static inline int barsize(u8 size) static int zpci_mem_init(void) { + BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) || + __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb)); + zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb), - 16, 0, NULL); + __alignof__(struct zpci_fmb), 0, NULL); if (!zdev_fmb_cache) goto error_zdev; -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html