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[RESEND,v2,19/19] prandom: Include <linux/percpu.h> in <linux/prandom.h>

Message ID 20240909075641.258968-20-ubizjak@gmail.com
State Superseded
Headers show
Series random: Resolve circular include dependency and include <linux/percpu.h> | expand

Commit Message

Uros Bizjak Sept. 9, 2024, 7:54 a.m. UTC 
<linux/percpu.h> include was removed from <linux/prandom.h>
in d9f29deb7fe8 ("prandom: Remove unused include") because
this inclusion broke arm64 due to a circular dependency
on include files.

__percpu tag is defined in include/linux/compiler_types.h, so there
is currently no direct need for the inclusion of <linux/percpu.h>.
However, in [1] we would like to repurpose __percpu tag as a named
address space qualifier, where __percpu macro uses defines from
<linux/percpu.h>.

The circular dependency was removed in xxxxxxxxxxxx ("random: Do not
include <linux/prandom.h> in <linux/random.h>") and it cleared
the path for the inclusion of <linux/percpu.h> in <linux/prandom.h>.

This patch is basically a revert of d9f29deb7fe8
("prandom: Remove unused include").

[1] https://lore.kernel.org/lkml/20240812115945.484051-4-ubizjak@gmail.com/

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
---
 include/linux/prandom.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/include/linux/prandom.h b/include/linux/prandom.h
index f7f1e5251c67..f2ed5b72b3d6 100644
--- a/include/linux/prandom.h
+++ b/include/linux/prandom.h
@@ -10,6 +10,7 @@ 
 
 #include <linux/types.h>
 #include <linux/once.h>
+#include <linux/percpu.h>
 #include <linux/random.h>
 
 struct rnd_state {