kernel/git/stable/linux-stable.git/arch/s390/lib, branch linux-5.14.y

s390: fix strrchr() implementation

2021-10-20T09:57:46+00:00

commit 8e0ab8e26b72a80e991c66a8abc16e6c856abe3d upstream. Fix two problems found in the strrchr() implementation for s390 architectures: evaluate empty strings (return the string address instead of NULL, if '\0' is passed as second argument); evaluate the first character of non-empty strings (the current implementation stops at the second). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Reported-by: Heiko Carstens (incorrect behavior with empty strings) Signed-off-by: Roberto Sassu Link: https://lore.kernel.org/r/20211005120836.60630-1-roberto.sassu@huawei.com Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik Signed-off-by: Greg Kroah-Hartman

s390/lib: use call_on_stack() macro

2021-07-08T20:12:18+00:00

Reviewed-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/lib,string: fix strcat() inline asm constraint modifier

2021-07-05T10:44:23+00:00

"dummy" is not only used as output but also as input. Therefore use the correct "+" constraint modifier. Fixes: 8cf23c8e1fec ("s390/lib,string: get rid of register asm") Reported-by: Sven Schnelle Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/lib,uaccess: fix copy_in_user_mvcos() inline asm clobber list

2021-07-05T10:44:23+00:00

General register 0 is clobbered within the inline assembly and therefore must be listed in the clobber list. Fixes: d1e18efa8fa9 ("s390/lib,uaccess: get rid of register asm") Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/lib,string: get rid of register asm

2021-06-28T09:18:28+00:00

Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/lib,uaccess: get rid of register asm

2021-06-28T09:18:28+00:00

Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/lib,xor: get rid of register asm

2021-06-28T09:18:28+00:00

Looking at the generate code this was just a micro-optimization. However given that as many register asm constructs as possible will be removed from s390 code, remove this one as well. Signed-off-by: Heiko Carstens Signed-off-by: Vasily Gorbik

s390/test_unwind: print test suite start/end info

2021-04-15T15:47:42+00:00

Add couple of additional info lines to make it easier to match test suite output and results. Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens

s390/test_unwind: add WARN if tests failed

2021-04-12T10:46:44+00:00

Trigger a warning if any of unwinder tests fail. This should help to prevent quiet ignoring of test results when panic_on_warn is enabled. Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens

s390/test_unwind: unify error handling paths

2021-04-12T10:46:44+00:00

Handle the case of "unwind state reliable but addr is 0" like other error cases in this function and trigger output of failing stacktrace to aid debugging. Signed-off-by: Vasily Gorbik Signed-off-by: Heiko Carstens