This is a note to let you know that I've just added the patch titled s390/thp: implement pmdp_set_wrprotect()
to the 3.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: s390-thp-implement-pmdp_set_wrprotect.patch and it can be found in the queue-3.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@vger.kernel.org> know about it. >From be3286507dab888d4aad9f91fd6ff5202b24cd5b Mon Sep 17 00:00:00 2001 From: Gerald Schaefer <gerald.schae...@de.ibm.com> Date: Mon, 21 Jan 2013 16:48:07 +0100 Subject: s390/thp: implement pmdp_set_wrprotect() From: Gerald Schaefer <gerald.schae...@de.ibm.com> commit be3286507dab888d4aad9f91fd6ff5202b24cd5b upstream. On s390, an architecture-specific implementation of the function pmdp_set_wrprotect() is missing and the generic version is currently being used. The generic version does not flush the tlb as it would be needed on s390 when modifying an active pmd, which can lead to subtle tlb errors on s390 when using transparent hugepages. This patch adds an s390-specific implementation of pmdp_set_wrprotect() including the missing tlb flush. Signed-off-by: Gerald Schaefer <gerald.schae...@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidef...@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/s390/include/asm/pgtable.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1365,6 +1365,18 @@ static inline void pmdp_invalidate(struc __pmd_idte(address, pmdp); } +#define __HAVE_ARCH_PMDP_SET_WRPROTECT +static inline void pmdp_set_wrprotect(struct mm_struct *mm, + unsigned long address, pmd_t *pmdp) +{ + pmd_t pmd = *pmdp; + + if (pmd_write(pmd)) { + __pmd_idte(address, pmdp); + set_pmd_at(mm, address, pmdp, pmd_wrprotect(pmd)); + } +} + static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot) { pmd_t __pmd; Patches currently in stable-queue which might be from gerald.schae...@de.ibm.com are queue-3.7/s390-thp-implement-pmdp_set_wrprotect.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html