Messages in this thread Patch in this message | | | From | Gerald Schaefer <> | Subject | [PATCH] thp, s390: add missing earlyclobber to inline assembly | Date | Thu, 13 Sep 2012 16:21:03 +0200 |
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The constraints of the rrbm inline assembly are missing two earlyclobber operands, which can lead to an addressing exception depending on compiler register allocation decisions.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> ---
Hello Andrew, please merge this with patch thp-s390-architecture-backend-for-thp-on-s390.patch
arch/s390/include/asm/pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 1393a3c..ce67458 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1296,7 +1296,8 @@ static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, " ogr %1,%0\n" " la %3,0(%4,%3)\n" " brct %2,0b\n" - : "=d" (tmp), "+d" (rc), "+d" (counter), "+a" (pmd_addr) + : "=&d" (tmp), "+&d" (rc), "+d" (counter), + "+a" (pmd_addr) : "a" (64 * 4096UL) : "cc"); rc = !!rc; } else { -- 1.7.11.6
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