Re: [PATCH v3 4/9] arc: use generic strncpy/strnlen from_user

2021-07-22 Thread Vineet Gupta
On 7/22/21 5:48 AM, Arnd Bergmann wrote: > From: Arnd Bergmann > > Remove the arc implemenation of strncpy/strnlen and instead use the > generic versions. The arc version is fairly slow because it always does > byte accesses even for aligned data, and its checks for user_addr_max() > differ from

Re: [PATCH v3 4/9] arc: use generic strncpy/strnlen from_user

2021-07-22 Thread Christoph Hellwig
On Thu, Jul 22, 2021 at 02:48:09PM +0200, Arnd Bergmann wrote: > From: Arnd Bergmann > > Remove the arc implemenation of strncpy/strnlen and instead use the > generic versions. The arc version is fairly slow because it always does > byte accesses even for aligned data, and its checks for

[PATCH v3 4/9] arc: use generic strncpy/strnlen from_user

2021-07-22 Thread Arnd Bergmann
From: Arnd Bergmann Remove the arc implemenation of strncpy/strnlen and instead use the generic versions. The arc version is fairly slow because it always does byte accesses even for aligned data, and its checks for user_addr_max() differ from the generic code. Signed-off-by: Arnd Bergmann