tree c8d29a9902439c90e0032465cef2edd66ba667a4
parent 76f52cbbbea7e58492226670c51ed24589f69e4a
author Arnd Bergmann <arnd@arndb.de> 1749547628 +0200
committer Jason A. Donenfeld <Jason@zx2c4.com> 1749576863 -0600

random: use offstack cpumask when necessary

The entropy generation function keeps a local cpu mask on the stack,
which can trigger warnings in configurations with a large number of
CPUs:

    drivers/char/random.c:1292:20: error: stack frame size (1288)
    exceeds limit (1280) in 'try_to_generate_entropy' [-Werror,-Wframe-larger-than]

Use the cpumask interface to dynamically allocate it in those
configurations.

Fixes: 1c21fe00eda7 ("random: spread out jitter callback to different CPUs")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>