linux-kernel - Re: [PATCH v6 01/37] fix missing vmalloc.h includes

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Date: Wed, 3 Apr 2024 14:12:40 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
Cc: kent.overstreet@...ux.dev, mhocko@...e.com, vbabka@...e.cz,
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Subject: Re: [PATCH v6 01/37] fix missing vmalloc.h includes

On Thu, Mar 21, 2024 at 09:36:23AM -0700, Suren Baghdasaryan wrote:
> From: Kent Overstreet <kent.overstreet@...ux.dev>
> 
> The next patch drops vmalloc.h from a system header in order to fix
> a circular dependency; this adds it to all the files that were pulling
> it in implicitly.
> 
> Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
> Signed-off-by: Suren Baghdasaryan <surenb@...gle.com>
> Reviewed-by: Pasha Tatashin <pasha.tatashin@...een.com>

I bisected an error that I see when building ARCH=loongarch allmodconfig
to commit 302519d9e80a ("asm-generic/io.h: kill vmalloc.h dependency")
in -next, which tells me that this patch likely needs to contain
something along the following lines, as LoongArch was getting
include/linux/sizes.h transitively through the vmalloc.h include in
include/asm-generic/io.h.

Cheers,
Nathan

  In file included from arch/loongarch/include/asm/io.h:11,
                   from include/linux/io.h:13,
                   from arch/loongarch/mm/mmap.c:6:
  include/asm-generic/io.h: In function 'ioport_map':
  arch/loongarch/include/asm/addrspace.h:124:25: error: 'SZ_32M' undeclared (first use in this function); did you mean 'PS_32M'?
    124 | #define PCI_IOSIZE      SZ_32M
        |                         ^~~~~~
  arch/loongarch/include/asm/addrspace.h:126:26: note: in expansion of macro 'PCI_IOSIZE'
    126 | #define IO_SPACE_LIMIT  (PCI_IOSIZE - 1)
        |                          ^~~~~~~~~~
  include/asm-generic/io.h:1113:17: note: in expansion of macro 'IO_SPACE_LIMIT'
   1113 |         port &= IO_SPACE_LIMIT;
        |                 ^~~~~~~~~~~~~~
  arch/loongarch/include/asm/addrspace.h:124:25: note: each undeclared identifier is reported only once for each function it appears in
    124 | #define PCI_IOSIZE      SZ_32M
        |                         ^~~~~~
  arch/loongarch/include/asm/addrspace.h:126:26: note: in expansion of macro 'PCI_IOSIZE'
    126 | #define IO_SPACE_LIMIT  (PCI_IOSIZE - 1)
        |                          ^~~~~~~~~~
  include/asm-generic/io.h:1113:17: note: in expansion of macro 'IO_SPACE_LIMIT'
   1113 |         port &= IO_SPACE_LIMIT;
        |                 ^~~~~~~~~~~~~~

diff --git a/arch/loongarch/include/asm/addrspace.h b/arch/loongarch/include/asm/addrspace.h
index b24437e28c6e..7bd47d65bf7a 100644
--- a/arch/loongarch/include/asm/addrspace.h
+++ b/arch/loongarch/include/asm/addrspace.h
@@ -11,6 +11,7 @@
 #define _ASM_ADDRSPACE_H
 
 #include <linux/const.h>
+#include <linux/sizes.h>
 
 #include <asm/loongarch.h>