Hi all, the i386 ABI is a little special in that it uses less than natural alignment for 64-bit integer types (u64 and s64), and a significant amount of our compat handlers deals with just that. Unfortunately there is no good way to check for this specific quirk at runtime, similar how in_compat_syscall() checks for a compat syscall. This series adds such a check, and then uses the quota code as an example of how this improves the compat handling. I have a few other places in mind where this will also be useful going forward. Changes since v1: - use asm-generic/compat.h instead of linux/compat.h for compat_u64 and compat_s64 - fix a typo Diffstat: b/arch/arm64/include/asm/compat.h | 2 b/arch/mips/include/asm/compat.h | 2 b/arch/parisc/include/asm/compat.h | 2 b/arch/powerpc/include/asm/compat.h | 2 b/arch/s390/include/asm/compat.h | 2 b/arch/sparc/include/asm/compat.h | 3 b/arch/x86/entry/syscalls/syscall_32.tbl | 2 b/arch/x86/include/asm/compat.h | 3 b/fs/quota/Kconfig | 5 - b/fs/quota/Makefile | 1 b/fs/quota/compat.h | 34 ++++++++ b/fs/quota/quota.c | 73 +++++++++++++++--- b/include/asm-generic/compat.h | 8 ++ b/include/linux/compat.h | 9 ++ b/include/linux/quotaops.h | 3 b/kernel/sys_ni.c | 1 fs/quota/compat.c | 120 ------------------------------- 17 files changed, 113 insertions(+), 159 deletions(-)
