The ACPICA resource manager was mostly rewritten around the 20051021 time frame, and we may have disturbed some of the aligned access support. I'll look at these, it looks like enough info to fix them.
Thanks, Bob > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:linux-acpi- > [EMAIL PROTECTED] On Behalf Of Luck, Tony > Sent: Thursday, February 02, 2006 11:46 AM > To: [email protected] > Cc: [email protected] > Subject: some new unaligned access while booting ia64 (HP rx2620) > > Booting a snapshot of Linus' tree this morning I saw a few (new?) > kernel unaligned access warnings: > > ACPI: Subsystem revision 20060127 > ACPI: Interpreter enabled > ACPI: Using IOSAPIC for interrupt routing > ACPI: PCI Root Bridge [PCI0] (0000:00) > kernel unaligned access to 0xe00000407ec5a204, ip=0xa0000001003af8c0 > kernel unaligned access to 0xe00000407ec5a23c, ip=0xa0000001003af8c0 > kernel unaligned access to 0xe00000407ec5a28c, ip=0xa0000001003af8c0 > kernel unaligned access to 0xe00000407ec5a1fc, ip=0xa0000001003ae6c1 > kernel unaligned access to 0xe00000407ec5a204, ip=0xa0000001003ae6d1 > ACPI: PCI Interrupt Routing Table [\_SB_.SBA0.PCI0._PRT] > ACPI: PCI Root Bridge [PCI1] (0000:20) > > The first three at ip=0xa0000001003af8c0 are in > acpi_rs_get_resource_source() > while zeroing a 64-bit value: > a0000001003af8c0: dc 00 00 46 98 11 [MFB] (p06) st8 [r35]=r0 > > Which looks from the assembly code like we are doing a: > resource_source->string_ptr = 0; > but I don't see anything quite like that in the C source (but > there may be macros & inlining happening). > > The other two, ip=0xa0000001003ae6c1 and ip=0xa0000001003ae6d1 are in > acpi_resource_to_address64() close together in this little > block: > > a0000001003ae6c6: 50 02 58 30 20 00 ld8 r37=[r22] > a0000001003ae6cc: 00 00 00 20 nop.b 0x0;; > a0000001003ae6d0: 19 00 94 1e 98 11 [MMB] st8 [r15]=r37 > a0000001003ae6d6: 70 02 40 30 20 00 ld8 r39=[r16] > > These loads are dereferencing the acpi_resource structure that was passed > as the first argument (offsets 40 and 48 bytes). > > -Tony > - > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
