kernel/linux.git/arch/parisc/lib, branch v6.19.11

parisc: Remove spurious if statement from raw_copy_from_user()

2025-10-07T14:44:29+00:00

Accidently introduced in commit 91428ca9320e. Signed-off-by: John David Anglin Signed-off-by: Helge Deller Fixes: 91428ca9320e ("parisc: Check region is readable by user in raw_copy_from_user()") Cc: stable@vger.kernel.org # v5.12+

parisc: Check region is readable by user in raw_copy_from_user()

2025-07-25T20:45:23+00:00

Because of the way the _PAGE_READ is handled in the parisc PTE, an access interruption is not generated when the kernel reads from a region where the _PAGE_READ is zero. The current code was written assuming read access faults would also occur in the kernel. This change adds user access checks to raw_copy_from_user(). The prober_user() define checks whether user code has read access to a virtual address. Note that page faults are not handled in the exception support for the probe instruction. For this reason, we precede the probe by a ldb access check. Signed-off-by: John David Anglin Signed-off-by: Helge Deller Cc: stable@vger.kernel.org # v5.12+

parisc: Remove memcpy_fromio

2025-02-03T18:27:00+00:00

Fully migrate parisc to the IO functions from lib/iomem_copy.c. In a recent patch the functions memset_io and memcpy_toio were removed, but the memcpy_fromio was kept, because for very short sequences it does half word accesses, whereas the functions in lib/iomem_copy.c do byte accesses until the memory is naturally aligned and then do machine word accesses. But I don't think the single half-word access merits keeping the arch specific implementation, so, remove it as well. Signed-off-by: Julian Vetter Acked-by: Arnd Bergmann Signed-off-by: Helge Deller

parisc: Fix formatting errors in io.c

2025-02-03T18:26:52+00:00

Mutliple lines in the file contain tabs in lines where there is no code. Just remove them. Signed-off-by: Julian Vetter Signed-off-by: Helge Deller

Merge tag 'parisc-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2025-01-24T19:52:59+00:00

Pull parisc architecture updates from Helge Deller: - Temporarily disable jump label support to avoid kernel crash with 32-bit kernel - Add vdso linker script to 'targets' instead of extra-y - Remove parisc versions of memcpy_toio and memset_io * tag 'parisc-for-6.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Temporarily disable jump label support parisc: add vdso linker script to 'targets' instead of extra-y parisc: Remove memcpy_toio and memset_io

parisc: Remove memcpy_toio and memset_io

2024-12-07T16:46:09+00:00

Recently new functions for IO memcpy and IO memset were added in libs/iomem_copy.c. So, remove the arch specific implementations, to fall back to the generic ones which do exactly the same. Keep memcpy_fromio for now, because it's slight more optimized by doing 'u16' accesses if the buffer is aligned this way. Signed-off-by: Julian Vetter Reviewed-by: Arnd Bergmann Signed-off-by: Helge Deller

net: checksum: Move from32to16() to generic header

2024-10-30T14:29:59+00:00

from32to16() is used by lib/checksum.c and also by arch/parisc/lib/checksum.c. The next patch will use it in the bpf_csum_diff helper. Move from32to16() to the include/net/checksum.h as csum_from32to16() and remove other implementations. Signed-off-by: Puranjay Mohan Signed-off-by: Daniel Borkmann Reviewed-by: Toke Høiland-Jørgensen Acked-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20241026125339.26459-2-puranjay@kernel.org

parisc: add u16 support to cmpxchg()

2024-04-10T05:06:00+00:00

Add (and export) __cmpxchg_u16(), teach __cmpxchg() to use it. And get rid of manual truncation down to u8, etc. in there - the only reason for those is to avoid bogus warnings about constant truncation from sparse, and those are easy to avoid by turning that switch into conditional expression. Signed-off-by: Al Viro Signed-off-by: Paul E. McKenney

parisc: unify implementations of __cmpxchg_u{8,32,64}

2024-04-10T05:06:00+00:00

identical except for type name involved Signed-off-by: Al Viro Signed-off-by: Paul E. McKenney

parisc: __cmpxchg_u32(): lift conversion into the callers

2024-04-10T05:06:00+00:00

__cmpxchg_u32() return value is unsigned int explicitly cast to unsigned long. Both callers are returns from functions that return unsigned long; might as well have __cmpxchg_u32() return that unsigned int (aka u32) and let the callers convert implicitly. Signed-off-by: Al Viro Signed-off-by: Paul E. McKenney