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linux/arch/mips
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Paul Burton d411da06ab
MIPS: dma-noncoherent: Remove bogus condition in dma_sync_phys() 
Commit e36863a550 ("MIPS: HIGHMEM DMA on noncoherent MIPS32
processors") introduced code which:

  1) Calculates an offset within a page, by ANDing an address
     with ~PAGE_MASK.

  2) Checks whether that offset is >= PAGE_SIZE.

This check can never evaluate true, making the code it guards
unreachable. smatch spots bogus arithmetic resulting from the
impossible condition, resulting in the following warning:

  arch/mips/mm/dma-noncoherent.c:125
    dma_sync_phys() warn: mask and shift to zero

Fix this by removing the impossible to satisfy condition & the
unreachable code it guards.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
2019-02-19 12:17:43 -08:00
..
alchemy A few early MIPS fixes for 4.21: 2019-01-05 12:48:25 -08:00
ar7 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ath25 PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
ath79 MIPS: ath79: drop !OF clock code 2019-01-22 11:17:22 -08:00
bcm47xx MIPS: BCM47XX: Fix/improve Buffalo WHR-G54S support 2019-02-11 13:29:33 -08:00
bcm63xx A few early MIPS fixes for 4.21: 2019-01-05 12:48:25 -08:00
bmips mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
boot MIPS: OCTEON: program rx/tx-delay always from DT 2019-02-07 15:22:38 -08:00
cavium-octeon MIPS: OCTEON: program rx/tx-delay always from DT 2019-02-07 15:22:38 -08:00
cobalt
configs Here's the main MIPS pull for Linux 4.21. Core architecture changes 2018-12-26 10:45:33 -08:00
crypto MIPS: crypto: Add crc32 and crc32c hw accelerated module 2018-02-19 20:50:36 +00:00
dec mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
emma mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
fw mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
generic MIPS: mscc: add PCB120 to the ocelot fitImage 2018-10-09 10:38:29 -07:00
include MIPS: OCTEON: program rx/tx-delay always from DT 2019-02-07 15:22:38 -08:00
jazz mips/jazz: remove the mapping_error dma_map_ops method 2018-12-06 06:56:38 -08:00
jz4740 mmc: jz4740: Use GPIO descriptor for power 2018-12-17 08:26:24 +01:00
kernel MIPS: CM: Fix indentation 2019-02-15 14:22:44 -08:00
kvm MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
lantiq cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
lasat mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
lib MIPS: MemoryMapID (MMID) Support 2019-02-04 10:56:41 -08:00
loongson32 MIPS: Loongson32: Remove DMA & NAND devices from ls1b/board.c 2019-02-04 14:44:33 -08:00
loongson64 Kconfig file consolidation for v4.21 2018-12-29 13:40:29 -08:00
math-emu mips: math-emu: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
mm MIPS: dma-noncoherent: Remove bogus condition in dma_sync_phys() 2019-02-19 12:17:43 -08:00
mti-malta MIPS: malta: Use img-ascii-lcd driver for LCD display 2018-11-20 21:05:39 -08:00
net MIPS: eBPF: Remove REG_32BIT_ZERO_EX 2019-02-19 12:17:41 -08:00
netlogic mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
oprofile Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
paravirt mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pci MIPS: ath79: drop legacy pci code 2019-01-22 11:17:22 -08:00
pic32 mips: unify prom_putchar() declarations 2018-07-17 09:40:17 -07:00
pistachio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pmcs-msp71xx PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
pnx833x mtd: rawnand: Move platform_nand_xxx definitions out of rawnand.h 2018-10-03 11:12:25 +02:00
power License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ralink mips: ralink: no need to check return value of debugfs_create functions 2019-01-22 11:17:20 -08:00
rb532 ata: rb532_cf: Convert to use GPIO descriptors 2018-12-04 17:15:25 -07:00
sgi-ip22 MIPS: Remove no-op/identity casts 2018-08-31 11:49:20 -07:00
sgi-ip27 MIPS: Loongson3,SGI-IP27: Simplify max_low_pfn calculation 2018-11-15 15:42:15 -08:00
sgi-ip32 MIPS: IP32: use generic dma noncoherent ops 2018-06-24 09:27:27 -07:00
sibyte Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
sni MIPS: sni: Remove the read_persistent_clock() 2018-05-14 23:58:25 +01:00
tools MIPS: Use a custom elf-entry program to find kernel entry point 2018-08-30 09:39:22 -07:00
txx9 PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
vdso MIPS: Enable Undefined Behavior Sanitizer UBSAN 2018-11-20 12:23:06 -08:00
vr41xx PCI: consolidate PCI config entry in drivers/pci 2018-11-23 11:45:34 +09:00
Kbuild MIPS: Disable Werror when W= is set 2017-04-10 11:56:07 +02:00
Kbuild.platforms MIPS: Xilfpga: Switch to using generic defconfigs 2017-11-08 22:54:14 +00:00
Kconfig MIPS: Loongson32: Fix config brokenness; select SYS_SUPPORTS_32BIT_KERNEL 2019-02-04 14:44:06 -08:00
Kconfig.debug Kconfig: consolidate the "Kernel hacking" menu 2018-08-02 08:06:48 +09:00
Makefile MIPS: Add GINVT instruction helpers 2019-02-04 10:56:35 -08:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00