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tty: tty_buffer: switch data type to u8

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There is no reason to have tty_buffer::data typed as unsigned long.
Switch to u8, but preserve the ulong alignment using __aligned.

This allows for the cast removal from char_buf_ptr(). And for use of
struct_size() in the allocation in tty_buffer_alloc() -- in the next
patch.

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230816105530.3335-2-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE) 2023-08-16 12:55:21 +02:00 • committed by Greg Kroah-Hartman
parent 2f4926723a
commit d4d13ff3ac
1 changed files with 2 additions and 2 deletions
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4
include/linux/tty_buffer.h
View file

@ -19,12 +19,12 @@ struct tty_buffer {
unsigned int read;
bool flags;
/* Data points here */
unsigned long data[];
u8 data[] __aligned(sizeof(unsigned long));
};
static inline u8 *char_buf_ptr(struct tty_buffer *b, unsigned int ofs)
{
return ((u8 *)b->data) + ofs;
return b->data + ofs;
}
static inline u8 *flag_buf_ptr(struct tty_buffer *b, unsigned int ofs)