+ mm-add-prototype-for-__add_to_page_cache_locked.patch added to -mm tree

+ mm-add-prototype-for-__add_to_page_cache_locked.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: add prototype for __add_to_page_cache_locked()
has been added to the -mm tree.  Its filename is
     mm-add-prototype-for-__add_to_page_cache_locked.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-add-prototype-for-__add_to_page_cache_locked.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-add-prototype-for-__add_to_page_cache_locked.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Souptick Joarder <jrdr.linux@gmail.com>
Subject: mm: add prototype for __add_to_page_cache_locked()

Otherwise it causes a gcc warning:

../mm/filemap.c:830:14: warning: no previous prototype for
`__add_to_page_cache_locked' [-Wmissing-prototypes]

A previous attempt to make this function static led to compilation errors
when CONFIG_DEBUG_INFO_BTF is enabled because __add_to_page_cache_locked()
is referred to by BPF code.

Adding a prototype will silence the warning.

Link: https://lkml.kernel.org/r/1608693702-4665-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/mm.h |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/include/linux/mm.h~mm-add-prototype-for-__add_to_page_cache_locked
+++ a/include/linux/mm.h
@@ -216,6 +216,13 @@ int overcommit_kbytes_handler(struct ctl
 		loff_t *);
 int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *,
 		loff_t *);
+/*
+ * Any attempt to mark this function as static leads to build failure
+ * when CONFIG_DEBUG_INFO_BTF is enabled because __add_to_page_cache_locked()
+ * is referred to by BPF code. This must be visible for error injection.
+ */
+int __add_to_page_cache_locked(struct page *page, struct address_space *mapping,
+		pgoff_t index, gfp_t gfp, void **shadowp);
 
 #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
 
_

Patches currently in -mm which might be from jrdr.linux@gmail.com are

mm-add-prototype-for-__add_to_page_cache_locked.patch

+ mm-add-prototype-for-__add_to_page_cache_locked.patch added to -mm tree

[akpm]

The patch titled
     Subject: include/linux/mm.h: add prototype for __add_to_page_cache_locked()
has been added to the -mm tree.  Its filename is
     mm-add-prototype-for-__add_to_page_cache_locked.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-add-prototype-for-__add_to_page_cache_locked.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-add-prototype-for-__add_to_page_cache_locked.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Souptick Joarder <jrdr.linux@gmail.com>
Subject: include/linux/mm.h: add prototype for __add_to_page_cache_locked()

Otherwise it causes a gcc warning:

../mm/filemap.c:830:14: warning: no previous prototype for
`__add_to_page_cache_locked' [-Wmissing-prototypes]

A previous attempt to make this function static led to compilation errors
for a few architectures.

Adding a prototype will silence the warning.

Link: https://lkml.kernel.org/r/1608646792-29073-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/mm.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/include/linux/mm.h~mm-add-prototype-for-__add_to_page_cache_locked
+++ a/include/linux/mm.h
@@ -216,6 +216,12 @@ int overcommit_kbytes_handler(struct ctl
 		loff_t *);
 int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *,
 		loff_t *);
+/*
+ * Any attempt to mark this function as static leads to build failure
+ * for few architectures. Adding a prototype to silence gcc warning.
+ */
+int __add_to_page_cache_locked(struct page *page, struct address_space *mapping,
+		pgoff_t offset, gfp_t gfp, void **shadowp);
 
 #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n))
 
_

Patches currently in -mm which might be from jrdr.linux@gmail.com are

mm-add-prototype-for-__add_to_page_cache_locked.patch