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Date:   Tue, 5 Oct 2021 15:24:33 +0200
From:   Juergen Gross <>
To:     Heiko Carstens <>,
        Roberto Sassu <>
Subject: Re: [PATCH v2] s390: Fix strrchr() implementation

On 05.10.21 15:14, Heiko Carstens wrote:
> On Tue, Oct 05, 2021 at 02:08:36PM +0200, Roberto Sassu wrote:
>> 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:
>> Reported-by: Heiko Carstens <> (incorrect behavior with empty strings)
>> Signed-off-by: Roberto Sassu <>
>> ---
>>   arch/s390/lib/string.c | 15 +++++++--------
>>   1 file changed, 7 insertions(+), 8 deletions(-)
> Applied, thanks!

Really? I just wanted to write a response: len is unsigned (size_t)
and compared to be >= 0, which sounds like always true.


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