Re: [PATCH 21/21] memblock: drop memblock_alloc_*_nopanic() variants
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From: Petr Mladek <pmladek@suse.com>
Date: 2019-01-17 09:28:51
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linux-alpha, linux-arm-kernel, linux-devicetree, linux-mips, linux-mm, linux-s390, linux-sh, linux-um, linux-usb, lkml, sparclinux
On Wed 2019-01-16 15:44:21, Mike Rapoport wrote:
As all the memblock allocation functions return NULL in case of error rather than panic(), the duplicates with _nopanic suffix can be removed.
[...]
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diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index c4f0a41..ae65221 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c@@ -1147,17 +1147,14 @@ void __init setup_log_buf(int early) if (!new_log_buf_len) return; - if (early) { - new_log_buf = - memblock_alloc(new_log_buf_len, LOG_ALIGN); - } else { - new_log_buf = memblock_alloc_nopanic(new_log_buf_len, - LOG_ALIGN); - } - + new_log_buf = memblock_alloc(new_log_buf_len, LOG_ALIGN);
The above change is enough.
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if (unlikely(!new_log_buf)) { - pr_err("log_buf_len: %lu bytes not available\n", - new_log_buf_len); + if (early) + panic("log_buf_len: %lu bytes not available\n", + new_log_buf_len);
panic() is not needed here. printk() will just continue using the (smaller) static buffer.
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+ else + pr_err("log_buf_len: %lu bytes not available\n", + new_log_buf_len); return; }
Best Regards, Petr