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authorNathan Lynch <nathanl@linux.ibm.com>2024-01-16 08:09:25 -0600
committerSteven Rostedt (Google) <rostedt@goodmis.org>2024-01-18 09:22:02 -0500
commit7a8e9cdf9405819105ae7405cd91e482bf574b01 (patch)
tree5542d38879349906caa82bf87d9ada79f4c58112 /include
parent1057066009c4325bb1d8430c9274894d0860e7c3 (diff)
downloadlwn-7a8e9cdf9405819105ae7405cd91e482bf574b01.tar.gz
lwn-7a8e9cdf9405819105ae7405cd91e482bf574b01.zip
seq_buf: Make DECLARE_SEQ_BUF() usable
Using the address operator on the array doesn't work: ./include/linux/seq_buf.h:27:27: error: initialization of ‘char *’ from incompatible pointer type ‘char (*)[128]’ [-Werror=incompatible-pointer-types] 27 | .buffer = &__ ## NAME ## _buffer, \ | ^ Apart from fixing that, we can improve DECLARE_SEQ_BUF() by using a compound literal to define the buffer array without attaching a name to it. This makes the macro a single statement, allowing constructs such as: static DECLARE_SEQ_BUF(my_seq_buf, MYSB_SIZE); to work as intended. Link: https://lkml.kernel.org/r/20240116-declare-seq-buf-fix-v1-1-915db4692f32@linux.ibm.com Cc: stable@vger.kernel.org Acked-by: Kees Cook <keescook@chromium.org> Fixes: dcc4e5728eea ("seq_buf: Introduce DECLARE_SEQ_BUF and seq_buf_str()") Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/seq_buf.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/include/linux/seq_buf.h b/include/linux/seq_buf.h
index 5fb1f12c33f9..c44f4b47b945 100644
--- a/include/linux/seq_buf.h
+++ b/include/linux/seq_buf.h
@@ -22,9 +22,8 @@ struct seq_buf {
};
#define DECLARE_SEQ_BUF(NAME, SIZE) \
- char __ ## NAME ## _buffer[SIZE] = ""; \
struct seq_buf NAME = { \
- .buffer = &__ ## NAME ## _buffer, \
+ .buffer = (char[SIZE]) { 0 }, \
.size = SIZE, \
}